2.
   2021
/  
 
(    - II)
: 2     :50
:    -    ,        
             
I.      
II ,             
 ?    
III.             ?
     ?
IV.         :
(i) 
(ii) ?
V.  '   :
(i)  
(ii) 
2.
VI.       ?
(i) 
(ii) 
(iii)  
(iv)  
VII.     :
(i)  
(ii)  
(iii) 
(iv)    
VIII.    -     ?      
   ?
2.
   2021
/  
 
(    - II)
: 2     :50
:    -    ,        
             
I.      
: 
""   ,      
 ?    ,
  ,      ,   - 
  
        , ,
,  ,           
 ,    
     
    
             
 ,         -   , , ,  
 -                 
  
   ,   -   
1.  -    
   
 - '       ,      ;
    ,             
          ""    
  
2.
   :
 -       ,      :
     
 -             ,
              
 -       ,        

      
 
2.  -    
                 ,
               - 
 
!  ,  ,     
,    
  
  
    :
- 
  
 
 
           "" 
 
3.  -   
       
         
    ,      :
  
  
  
  
  ,            
  ,              
2.
4.   -    
               
   '         '   
    ,            
 
  
   :
 
 
- 
 (  
)
  
 ,    
   '    
5.  -    
               

   ,            
            
        :




 ,   '            
      
 
6.  -   
    -      
   
        ,      
 
 
    
 :

2.

 
, ,  ,        ,  
     
7.  -  
      ,     '     ,
,           
 
, 
   
 :
       
        ,    
  
 
      '   
8.  -     
        
      
           '     ,  
   
        :
- 


  
 ,               
         
9.  -   
2.
        ,         
 
   - , ,      
,    -         
         :       , 
  ;       ,         
-       ,       
 
   
?
      
      :
  -   
  
,     
 ,  ,  ,  
   !
   ,         
 

                 
           ,   
     ,   
 ,    
 ,       ,        ,
   
 ,      
II ,             
 ?    
:󷗿󷘀󷘁󷘂󷘃    : ,   
                 ,  
             , 
 
                
2.
  ,           ,   
 - 
   ,     
   
       -      - 
, ,            
            '   
󷘹󷘴󷘵󷘶󷘷󷘸  
                 
               
  
 ' ,      
  (, , ),  (, , ),     
   
   (, , )          
  ,    (, , )       
     :     ,   ,  
,   
󷷑󷷒󷷓󷷔  :    
 -  ,     
  
󷘹󷘴󷘵󷘶󷘷󷘸  
      
         
  (  )   (      )  

 (, )      
 (, )      
 (, )    
 (, )       
󷷑󷷒󷷓󷷔  :    ""  -      

 
󷈷󷈸󷈹󷈺󷈻󷈼          
  ,  ,  ,     
      '           
   
1.    
2.
:               
-             
  
:             
    ,       ,   
       
󷷑󷷒󷷓󷷔:        
          
2.   
:  ,         
   
  '         
:             
 ,      
󷷑󷷒󷷓󷷔:                ,
      
 
3.    
:      (    ,   
)    
:           
  
󷷑󷷒󷷓󷷔:  ,          
        
4.    
: ,    
 ,    ,  
              
:        , ,   
         
󷷑󷷒󷷓󷷔:             
             
5.     
:        ,   ,
    
2.
:            
     
󷷑󷷒󷷓󷷔:             
   -     
6.     
:            
:   '     ,     
   
󷷑󷷒󷷓󷷔:   
   ( ,  )    

      
󹶓󹶔󹶕󹶖󹶗󹶘  
  ,           
   
               
  
          
 
 
     ,     
?                 
   
            
 
󷈷󷈸󷈹󷈺󷈻󷈼         
1. :         
2. :         
3. :      
4. :      
5. :  '   '  
󷇮󷇭 
      
 -        ,
           
,       
, ,     
2.
  ,    
      ,   
  '   
 ,      ,   ,     ,  :

       
 ,      
              
     
III.             ?
     ?
:󷈷󷈸󷈹󷈺󷈻󷈼    
?
                
,                ,
   ,     ,       ,   
     ' -         ,  
           ,     
  ,             
󽆤          
󷄧󷄫  -     
        
  ,    
        -     
   -    
    ,     
 ;   ,    - 
  ,           
        
      
    -      
      
󷄧󷄬-   
2.
  , -   
       ,
                  
         
 :
        
        
        
󷄧󷄭         
  ,              
 
 :
     - 
  ' ,   ,        
 
󷄧󷄮         
          , ,   
  
     ' 
    , 
        
     
-  ,    !
󷄰󷄯  '    
       ,    :
   ( )   
     
              
2.
              
󷄧󷄱    
        
;        
 
 
         
      
     -     
       
-          
󼫞󼫟󼫠       ?
          ,     '
            ,    
     
󷄧󷄫     
                
 
      
       ;          
 
󷄧󷄬 '
                
    
  
   
        
2.
󷄧󷄭         
           ,    :
   
   
    
          
 
󷄧󷄮        
-    
        ,
          :
 

  
 
   
  :    '          
  
󷄰󷄯 ,   '  
           ,   

   
       
-
        
󷄧󷄱-   
       ,  -         
         
2.
󷊻󷊼󷊽 
    
;             
   
 ,     ,   

    ,            

-  ,       ,     ,  -
            ,     
  ,      
              
   
     ,  
       
   ,    
     ,    -
    ,        
IV.         :
(i) 
(ii) ?
:󷸤󷸥󷸧󷸦      :     
      -  , ,       

         '      - 
         ,  ,  
             
       
󷘹󷘴󷘵󷘶󷘷󷘸(i)   
             
    ,      ,         
       
 
󷈷󷈸󷈹󷈺󷈻󷈼   
1.   
o     - , ,  ,  
o           

 󷷑󷷒󷷓󷷔:    ,  -, 
   
       
2.
2.   -
o           
o  ,        
    󷷑󷷒󷷓󷷔:    
         
3. 
o      

o         󷷑󷷒󷷓󷷔:  
  
      
4. 
o 
       ,      

o        -   
5.    
o            
      󷷑󷷒󷷓󷷔:  ,    -
   '        - 
-   
6.  
o       
o   ,    󷷑󷷒󷷓󷷔:   
       
7.  
o         
o             
 
 󷷑󷷒󷷓󷷔:         

     ,     
󹶓󹶔󹶕󹶖󹶗󹶘  
15            ,   
          ,    - 
  ,   ,           
   ,            

 
󷘹󷘴󷘵󷘶󷘷󷘸(ii)   
2.
         ,    - 
   ,     ,       
   ,       
󷈷󷈸󷈹󷈺󷈻󷈼   
1.     
o  -   -    
o        -   
    󷷑󷷒󷷓󷷔:    '  
-    ,        
     
2.     
o        
o ,          󷷑󷷒󷷓󷷔:
        
3.   
o   ,       
o        󷷑󷷒󷷓󷷔:  
,  ,   
4.   
o        
o    ,          
o        
5.   
o               
o         󷷑󷷒󷷓󷷔: 
 
     
6.  
o           
o     ,    󷷑󷷒󷷓󷷔:  
        
7.  
o       󷷑󷷒󷷓󷷔: 
,      -  ,    -
     
󹶓󹶔󹶕󹶖󹶗󹶘  
2.
70             - 
 ,        ,     
   ,        ,   

      ,    
 
󷈷󷈸󷈹󷈺󷈻󷈼:   




,  
,    

, 
, 

, 
,  
 
  , 

   ,  
 

  , -

, ,  
󷇮󷇭 
     
 -  ,     
 ,  , ,      
 ,   -     
 ,  , ,      
 
     , 
          
     ,        ,
      
V.  '   :
(i)  
(ii) 
:󽇐-
      ,      
  , ,    
   
  
           
             
2.
    
     ,     
  
   
(i)  
           ,     
   
              ,  
     
?     , , , , 
      ,  ,     
        
 
󽆳󽆴   ?
            
        ""      
     
  ,    
     
󹲉󹲊󹲋󹲌󹲍   
   '           
     '   ,    ,      ,
        
󽆤   
?
      
:
       

       
    
 -,      
    ,         
  
 
  
󹼌󹼍󹼎󹼏󹼐   
2.
   '        :
  (H₂O₂)-       
  (  /  )
 
 ,         
    
  '     


󼩼󼩽󼩾󼪀󼩿    ?
    ,        
               , 
   ,      
󷋇󷋈󷋉󷋊󷋋󷋌 
        
:
          
        
      
    ,         
󷘹󷘴󷘵󷘶󷘷󷘸   
   
 
    
   
    
 
    
󹵙󹵚󹵛󹵜 
2.
             
     
 ,    ,   
    
(ii) 
      
 
         

       ...    ! ,  ,  
     
 ?
     
            
 ,          
 
󽆳󽆴  ?
             
             ,    
  
  -   
󹲉󹲊󹲋󹲌󹲍 
   
               '
     ,           ,  
             ,  
    

󼪿󼫂󼫃󼫀󼫄󼫅󼫁󼫆    ?
    :
1.   
2.         
3.     
4.     
2.
5.    '    
  ,    ' 1%  3%     ,   

󼩥󼩠󼩡󼩢󼩣󼩦󼩤    ?
  :
 
 ()
  
  
 

   ' ""    -      
 

󽆤  
   
       
  
 
   
 
    
󼩏󼩐󼩑 
 ?
  :
      
    
    
       
          
 
2.
󹵙󹵚󹵛󹵜 
            
   
       ,       ,  
      
󷘹󷘴󷘵󷘶󷘷󷘸 
󷄧󼿒 
          
,     
 ,    
 
       
󷄧󼿒
    
       
      
 
       '   
VI.       ?
(i) 
(ii) 
(iii)  
(iv)  
:󼪿󼫂󼫃󼫀󼫄󼫅󼫁󼫆 :   
 
, ,     ,  
     ,
,            

 -  
              ,
,          
2.
      , , ,  
       
󷘹󷘴󷘵󷘶󷘷󷘸(i) 
:        '   (
)      '   
:
1.   :,     '   ,   
      
2.  
 :       
 
3.   :         ,
            
4.  :         
󷷑󷷒󷷓󷷔: -          
  
            
 :             
     ,          ' 
            ,   
 
󷘹󷘴󷘵󷘶󷘷󷘸(ii) 
:           
   
:
1.  :    ,    

 
2.   :     ,     

3.  :-   , ,      
4.  :     ,      
       
󷷑󷷒󷷓󷷔:     '      

              
2.
 :   
            
         ,      

 
󷘹󷘴󷘵󷘶󷘷󷘸(iii)  
:              '
  
:
1. :       , ,   
 '  
 
2.  :     
 ,  -  - 
      
3.    :   ,   ,  
      
󷷑󷷒󷷓󷷔:              
             '    
 :             
  ,         
,   
        
 -     
󷘹󷘴󷘵󷘶󷘷󷘸(iv)  
:       '     - 
     
:
1.  : -      
2.   :          -  

3. :            
4. :          
󷷑󷷒󷷓󷷔:  ,   ,       -
                
 
2.
 :              
-  -         
   
  
      
󷈷󷈸󷈹󷈺󷈻󷈼  
  
  ,   
        
   :
    
   
 
    
 
   
     
 ,        

 
󹵍󹵉󹵎󹵏󹵐 
 


 

 (
)
, ,  
 , 

 ()
, ,

  , 
 
  
 
 , 
, 
 
 
-, 

 , 

󷇮󷇭 
             
    -  , , ,  -   


,          
          
    -  '  
    -    
2.
VII.     :
(i)  
(ii)  
(iii) 
(iv)    
:(i)   
   
           ,   
,            
    
  , ,          , ,   
        ,      ,   
, ,  , ,            
 
,     
   '     :
  
   
  
  
 
   
1.  -  ,  
2.  -   '   
3. - , ,  ,      
4.  -   '      
     
 -      
 -  '  
 -      ,    
  -  '   
2.
  ,       " "   
  ,    
 ,     

 
(ii)  
  ,  ,       
    
      ?        '  
      
         ,      
        ' , ,      
 
 ?
    ' -   ,        
     ,             , 
  
         ,      ' 

         '   
  
 
1. (  '  )
2.   
3. 
4. 
          
       
 
   
  
 
 
  
,     
  
 
2.

      
 ,             
  
              !
(iii) 
       
""  ,      ,
               
      ,        ,
,       
  -    
    
         :
          
      
    
      
 ,                 
   
1.   
           
2.  
                


3.  
     '       
     ?
    ,           :
 
 
2.
 
 
  
  
  
     
  :



   
,      '      
     

 
(iv)    
    ,            
     '      (   )
                
     
  :              
   ,        , 
-   
  
   
  ,       ,  :
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   ,   :
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    
 
2.
 
 -      
 - V-     
    
  


 

  
 
    
 ,           ,     
      

  -  , , ,     -    
   
        

,  
       '       
 ,   -            ,
              ,  ,
, ,             
  
VIII.    -     ?      
   ?
:󼫥󼫦󼫨󼫧󼫩󼫪󼫫: ,     
   
          
  
      '            , 
                 , 
2.
                  

    
  : 
   '  
 -         
        , -   ,      
        
󷘹󷘴󷘵󷘶󷘷󷘸  ?
     '    , ,       ,  
, , ,         
         ,      
 
  (  )   (     )  

     '           
 
󷷑󷷒󷷓󷷔  :               
  
󷈷󷈸󷈹󷈺󷈻󷈼  
      ' -         
            
1.   
, , ,      
        󷷑󷷒󷷓󷷔:     
   '   
2.  
       , , ,      
          󷷑󷷒󷷓󷷔:    ' 
 
3.     
,    ,  ,      
        ,      
󷷑󷷒󷷓󷷔:    '   
2.
4.     
, ,       
          󷷑󷷒󷷓󷷔:     
  
5.  
     (  ,      )   
       
     
󷷑󷷒󷷓󷷔:   '   
6.  
, ,      
    '    󷷑󷷒󷷓󷷔:   '
  
󼩺󼩻    
                    
   
-- :
1.   :
o          
o   , 
   
 
2.    :
o            
o          
3.   :
o           
o   ' -   5-10    
4.   :
o    
o       
5.   :
o             ' 
o    ,        
󷷑󷷒󷷓󷷔:      '       
  ,      ,    '   

2.
󼩺󼩻     
                  -
  (, 
 , )  -     
-- :
1.  :
o        
o         -  
o  , 
      
2. -    :
o  '  ,  ,    
o      
3.     :
o       
o     
4.  :
o        
o     
5.   :
o        
o  ' -       
󷷑󷷒󷷓󷷔:        '      
        ,        
      
󹶓󹶔󹶕󹶖󹶗󹶘  
  ,     ,        
'  
   ,         ,    ' 
       ,        
 :
 ,         
 
 ,         
 ,     ,            

             
󷈷󷈸󷈹󷈺󷈻󷈼    
1.   :     
2.    :-   -    
2.
3.   :       
4.  :     '      
5.    :      
󹵍󹵉󹵎󹵏󹵐 

  
, 
  +  
, 
  +  + 
, 
 +  
  ,

-  + 
, 
  ( + )
, 
    ( '  
)
󷇮󷇭 
    ,    
      ,   ,
   ,       , 
   
  
  () ,         
  () -        
 
"              
 
       ,       
 "