Easy2Siksha.com
  -2021
  

(    )
:    :60
:                  
           -E  
-
1.   ?        
2.            :
() 
()    ?
-
3.       :
() 
() .
4.      
Easy2Siksha.com
-
5.         
6.                ?
-
7.               
 
8.     
  -2021
  

(    )
:    :60
:                  
           -E  
-
1.   ?        
:󷩀󷨹󷨺󷨻󷩁󷩂󷨼󷨽󷨾󷨿:        
     ,             
                , 
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          
     , "
               ,    
   ,       "
 ,              ,   ,
  ,                
  
󷇴󷇵󷇶󷇷󷇸󷇹  ?
 ,                    
  ,  , ,             
  ,    ""  ,       
 :
:,     
:    -        -   
:     ,  ,   
 : ,   -     
  ,  ,          
󼨽󼨾󼨿󼩁󼩀   :     
     "" ,       -  
        ,        
 ,   
    "    "    ,   
      :
:    
 :   
:     
:    
  :    
 :   , , 
 ,     ,        -   ,  

Easy2Siksha.com
󷨕󷨓󷨔      
-         ,       
     :
1.󻏯󻏰󻏱󻏲󻏳󻏴󻏵󻏶󻏷󻏸󻏹  
      
,             
              ( ,  )
 -              
 
󹴡󹴵󹴣󹴤   :          
       ,        
          
2.󺪧󺪨󺪩󺪪 
   ,            
 
         
          
       ,          
     
3.󹖴󹖵󹖪󹖫󹖬󹖭󹖮󹖯󹖰󹖱󹖲󹖶󹖷󹖸󹖹󹖳    
  ,      
 - ,        
          
          
   -  ,        
  
4.󼪦󼪧󼪩󼪨󼪪󼪫󼪬  
          
         
    ,       
Easy2Siksha.com
                
      
5.󼨐󼨑󼨒   
    
          
          
  
      ,         -
  
6.󼪀󼪃󼪄󼪁󼪅󼪆󼪂󼪇   
 ,       
         
,         
         -           
        
7.󼩕󼩖󼩗󼩘󼩙󼩚    
  ,         
       ,   
   ,       
       ,        
   
8.󹲟󹲠󹲡󹲢     
 , , , , ,         
 ,      ,         
    (, , )    
         -         -
         
󷆫󷆪      
    
      ,  -       :
Easy2Siksha.com
 

 
 
 
              ,      ,
           -     
󹴷󹴺󹴸󹴹󹴻󹴼󹴽󹴾󹴿󹵀󹵁󹵂 
  ,             
     :
     
    
    
    
       -     
󷖳󷖴󷖵󷖶󷖷 :     ,      
                 
 
 ,  ,     
            ,    
       -  ,  ,    
   ,            , 
  ,  
            ,  
        
2.            :
() 
()    ?
: 󷨁󷨂󷨃󷨄󷨅󷨈󷨆󷨇  :        
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                
,                  
      
,     ,    -
   
                  
    :             
 -  
  ,               
, ,               

󼩎󼩏󼩐󼩑󼩒󼩓󼩔 :          
                   
    :
1.󷆫󷆪   
          
               

        ,   -   
         ,      
   
2.󺠟󺠠󺠡󺠢  
-  ,     
 ,        
       
       
3.󷃆󺡌󺡍  
             
           
               
4.󺝼󺝽󺝾󺝿󺞀󺞂󺞃󺞁  
  ,          
           
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              
5.󼿳-   
,  ,   ,  -       
,             
                
  
6.󼩎󼩏󼩐󼩑󼩒󼩓󼩔   
           ,    

 ,           
               -    
7.󺫨󺫩󺫪    
            
   ,         

              
8.󷊄󷊅󷊆󷊇󷊈󷊉   
  ,           
  
            
       ,     
9.󷨤󷨪󷨥󷨦󷨧󷨨󷨩      
              
            
              
10.󷸌󷸍     
 ,         
,           
               
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󷧤󷧥󷧦󷧧󷧨󷧩 :   
 ,              , 
        ,      
 ,     ,     
     
         ,         
?       ,       -    , 
     
󹲣󼩪󼩫󼩬󼩭󼩲󼩳󼩮󼩯󼩰󼩱 :          
              ,     
            -  ,    
  -  
1.󼰧󼰨󼰩󼰪󼰫󼰬󼰭 
             
             
           
         ,
     
2.󹰼    
             
  ,        
                 
,   
3.󼨽󼨾󼨿󼩁󼩀  
    ,     ( ) 
         ,     
          
4.󼩉󼩊󼩋󼩌󼩍   
,   ,         

,    ,        
            
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5.󻥡󻥢󻥣󻥤󻥥󻥦󻥧󻥨󻥩   
            
            
  ,             
6.󺫦󺫤󺫥󺫧    
      ,       
            ,    
   ,              
7.󹸯󹸭󹸮  
     -     :
    ()  
      
   
           
󷩀󷨹󷨺󷨻󷩁󷩂󷨼󷨽󷨾󷨿       
  


 
  ,  
   
 
/  ,   

 ;   
 
 ,  

 
  ,   

 

 , -
   

 
  ,  
 

󷙎󷙐󷙏 :     
           ,     
                 
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    ,   ,   -   
   ,                 
   ,           
-
3.       :
()
() .
:󷇴󷇵󷇶󷇷󷇸󷇹 
   :         
         ...
 , -          ,       
        ,       
,        ,       
  ,  ,     ,     , ",
             ?"
   
 , "     "     " 
  ,                
       :          
    "
             -   
       
󷖳󷖴󷖵󷖶󷖷()  -     
     ,          
 ,           ,  
 ,        
󺁩󺁪󺁫󺁬󺁭  
 ,               
, ,          ,   ,  
 ,    
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󼩎󼩏󼩐󼩑󼩒󼩓󼩔     
      -         -   
    :
1.   - , , 
      -       
2.   - , , 
        -       
3.   - , , 
          -      
4.   - , , 
   ,       
5. -  - , , 
      -        

󺂟󺂠󺂧󺂡󺂢󺂣󺂤󺂥󺂦󺂨    
        :
           ,    
         
           
               , 
     
󼨐󼨑󼨒     ?
            :
    
    
     
   
-       
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󹴮󹴯󹴰󹴱󹴲󹴳  :     
      ,              
          ,          
  ,      ,   ,     
 ,                  
     ,      , "       
  !"      -           
          
󹲣󼩪󼩫󼩬󼩭󼩲󼩳󼩮󼩯󼩰󼩱()  -   
     ,     
󻦕󻦖󻦗󻦘󻦙󻦚󻦛󻦜  
 ,        ,      (2D)
  ,     (3D)       ,    
     :
1.   - , , 
:,  , ,  , 
 ,          
2.   - , -,  
:  , , , 
         
󹲣󼩪󼩫󼩬󼩭󼩲󼩳󼩮󼩯󼩰󼩱     ?
        2D  (   )    , 
-       ,       
   ,           ,   
        
󷖳󷖴󷖵󷖶󷖷 2D       
    -            
      
 -               
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   -              
- -      
󷗛󷗜    
  ,      ,      
      
   ,           ,   
       
 3D  ,           
 ,    
󹴮󹴯󹴰󹴱󹴲󹴳  :       
  ,     -        
               
                ,
      ,     
       ,          
               ,    
           
󷆊󷆋󷆌󷆍󷆎󷆏:   
  ,    ,  ,  ,   ,   
       ,     :
     ,  ,  
      ,  ,   - 
 ,     -       -     
    
        ,           :
"        -      "
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4.      
:󷇴󷇵󷇶󷇷󷇸󷇹  :      
   ,          - , 
                   
             ,
            : "  -    
"
            , “,      ?”
   
  , ",        
            ,   
         "
         -    ,     ,  
 ,  ,           
!
󷖍󷖎󷖏󷖐󷖑   ?
               
           -  - , 
   -       
                
(    ),   ()    -   
        
󺁮󺁯󺁰     :
        (12-  )     
:
󽄬󽄭󽄮󽄯󽄰--  :
1.       
2.     12      (    )
3.           ,  
,     
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󷆊󷆋󷆌󷆍󷆎󷆏       :
󺭫1.  ( )
            



󷵻󷵼󷵽󷵾    -  
           ,    
󺭫2.  (   )
       
 +  = 
 +  = 
 +  =  ()
󷵻󷵼󷵽󷵾        
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󺭫3.  (-)
               
     
:
 +  = -
 +  = -
 +  = -
 +  = -
 +  = -
 +  = -
󷵻󷵼󷵽󷵾          
   12        
󼨐󼨑󼨒  :   
   ,              
     ,           
 ,        , "      
   ?"
   , ",  ,            
,     !"
󼯀󼯁󼯂   :
             
󷃆󼽢 (   )
      
:
 
 
 
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                 
   
󷖳󷖴󷖵󷖶󷖷:            
󷊄󷊅󷊆󷊇󷊈󷊉 (- )
   
   
:
 - 
 - 
                 
      
󷖳󷖴󷖵󷖶󷖷, -         
󷅑 (
  )
   
    
:
  
  
      
󷇍󷇑󷇎󷇏󷇒󷆱󷇐  :
        
 (, , ):       ,      
(, , ):       ,    
  
󷵻󷵼󷵽󷵾         (    )   
     (    )
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󼨽󼨾󼨿󼩁󼩀   :
           
     
  +       
 ()    /    
     ( )
    ( )
 ,  ,            
󷨲󷨳󷨸󷨴󷨵󷨶󷨷      :
1.  :  ,          
  
2.  :      
3.        
4.   :     
5.   :               
󼪀󼪃󼪄󼪁󼪅󼪆󼪂󼪇    
    ,           ,   
,                  
   
      , "         !"
     , "             
        ?"
󹳴󹳵󹳶󹳷     (     !):
             
 ,       
       
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      
        
 , , ,             !
-
5.         
:󻚠󻚡󻚢󻚣󻚤󻚥󻚦󻚧󻚫󻚨󻚩󻚪󻚬󻚭󻚮󻚯:           
       ,           
 -    -          
,       -   , "   
            "  ,    ,
    -     
,      ,            
                  
   ,          
󹸯󹸭󹸮  ?
       , ,    
  ,            
           ,  
          
  :
                  
       -,       
      ,  , ,      
󼩉󼩊󼩋󼩌󼩍   
             :
:      ,      
    
:   ;          
, ,  -19    
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:         -      
:            :
 (   )
    ,       
󼫴󼫵󼫶󼫷󼫹󼫸󼫺   ?
                    :
 ( )
 ( )
    
    
  
     ,               
   ,   
󹹋󹹌  :      ?
         ,       
 :
1.󻧀󻧁󻧂󻧃󻧄󻧅󻧆󻧇󻧈󻩈󻩉󻧲󻧳󻧴󻧵󻧶󻧷󻧸󻧹󻩊󻩋󻩌󻧺󻧻󻧼 
   , ,           

  (   )   (     )

:
          
          
2.󷬋󷬆󷬌󷬇󷬈󷬉󷬍󷬊  
          ,  , , ,     
         
:
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    
   
     
3.󼪦󼪧󼪩󼪨󼪪󼪫󼪬
 
          
 :


amoebiasis
          
4.󷑏󷑐󷑍󷑎
 
,  ,            

:
      
      
    ,          
5.󷈪󷈫󷈬󷈭 
     ,  ,            
   
    :


COVID-19
     
6.󼪚󼪛󼪜󼪝󼪞 
,   ,      
             
Easy2Siksha.com
          
7.󼨽󼨾󼨿󼩁󼩀    
      , ,     

      -   
           -     
8.󼩉󼩊󼩋󼩌󼩍    
,             
  
           
󼪀󼪃󼪄󼪁󼪅󼪆󼪂󼪇  :   
 ,                
        ?       ,
                 ,
   -     
    ,              
              
   ,    -    
󼨐󼨑󼨒        
  
 :
     ,     
   ( COVID-19)    
           
          ,      
 ,              :
        
 ,          
          
     -   
󷃆󼽢 :    
Easy2Siksha.com
   ,         , ,    
           ,    

          ,       -  
,  ,       
6.                ?
:󷊄󷊅󷊆󷊇󷊈󷊉 ,    :   
  ,                 - 
       ,          
    ,           
                 
  ,                  
     "  -  ,"   "  "
                 -    ,
    ,           ,  
   :    
            - ,     

󻚖󻚗󻚘󻚙󻚚󻚛󻚞󻚟󻚜󻚝 :     ?
,      
    ,              
 ,          ( )    
             :
1.    ( )
2.    (  )
3.   
4.   
5.    
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,      ,       ?
    :           
  ,             
 10  18      
,         ,      
         ,      
    
󹺧󹺨󹺩󹺪󹺫   
     ,            
           ,      
 
                 
    :

   
 

 
-     
   ,         ,  ,  
    ,          
󹴷󹴺󹴸󹴹󹴻󹴼󹴽󹴾󹴿󹵀󹵁󹵂    -   
1.  :    
2.  ():   
3. :           

4. :           
5.  :      .
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6. , ,  , 
󺫨󺫩󺫪      ?
        
     , "       ,   
       ,    "
       -            
  
1.      -  
    ( )      
           ,       
  :           
        
     :          
    
2.       
          ,  ,      ,
    () 
        ,       

                
 
              
     
3.    ()
             
              
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                  
4. -  ()
                     
               
  
  ,      :
-    (ACT)
   (.     )
 ( -    )
5.     
-              
  :
 ,        -   
             
               
 ,           
󼩉󼩊󼩋󼩌󼩍:       ?
 ,      ,   RTS,S/AS01 (    )  
             
  ,      ,  
           
󷊀󷊁󷊂󷊃  
-   ,               
                   
           
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                

  ,     -    
󹲹󹲺󹲻󹲼󹵉󹵊󹵋󹵌󹵍
                
   ,              
 ,  , -         
   ,          
    ,     ,    ,    
  
-
7.               
 
:󷏭󷏮󷏲󷏳󷏯󷏴󷏰󷏵󷏶󷏷󷏸󷏱       :       
       , "  "       
             ,     
          ?        
              ,
   ,            
        ,    ,  -
    "  "   
       ,          
                  
 ,               
 ,               
󷑏󷑐󷑍󷑎    ?
               
     -              
     ,  ?
Easy2Siksha.com
           ,   
         
, ,
,    
󷏹󷏺󷏻󷏼    
               
       
1.󼪦󼪧󼪩󼪨󼪪󼪫󼪬  :    
    ,       ,     , 
            
      -        
    :       ,        
 ,    
2.󼩼󼩽󼩾󼩿     
  ,   ,             
       ,         

           
:-     -       -    , 
  
3.󻑽󻑾󻑿     
          
               
 
                
                 
                    
   
4.󽅀        
            
        -     
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?       (    )       

5.󹺁󹺂    
            ,       -
    
  :        75°C  

      ,  ,     
 :               -    
6.󷃆󺡌󺡍  
        ,        

   ,    
             
7.󷏹󷏺󷏻󷏼     
           (     ),   
 :
    
      
   (      )    
          
󻦕󻦖󻦗󻦘󻦙󻦚󻦛󻦜    
                
                  
1.󽅀     
, ,               C 
 
      -          
              
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 : "  ,    "
2.󺫮󺫫󺫬󺫭    
               
  ,        
  ,  :             
  
3.󹻩󹻦󹻧󹻨󹻪FIFO  ( ,  )   
          -    ,   
 
             
4.󻥡󻥢󻥣󻥤󻥥󻥦󻥧󻥨󻥩     
, ,         
          
 :         -       
5.󷰕󷰖󷰗󷰘    
        
       
    - ,     
6.󹲽󹳉󹳊󹳋󹳌󹳍󹳎󹳔󹳕󹳏󹳐󹳑󹳒󹳖󹳓󹳗     
-    ,      
                 -
       
7.󻦕󻦖󻦗󻦘󻦙󻦚󻦛󻦜         
          
          -      
         
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󷇴󷇵󷇶󷇷󷇸󷇹  
             ,      
                 
                     
,   ,        
      ,  ,         
     
8.     
: 󷆖󷆗󷆙󷆚󷆛󷆜󷆘:      
    , -               
              ,    
                
 ,         ,      
          ,         
    --  ,      
        ;       ,  
      ,       , , ,
,          ,      
         ,       
  
󹰼        ?
     ,        
 :   ,      
  :           

 :     ,      
 
           
       
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,            
󷅑 1:  -   
                 
         ,  ,      

:        
      ,  , ,     
󷊄󷊅󷊆󷊇󷊈󷊉 2:  -    
 ,    -    ,       
   , ,    -    
  :           
:             
       ,        
󼨽󼨾󼨿󼩁󼩀 3:    -   
           (  )
   
:        -    
flocculation (     )        
   
       -          
     ,          
:  -             
󼰧󼰨󼰩󼰪󼰫󼰬󼰭 4:  -      
             
  :       
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:      
                 
     
󼪦󼪧󼪩󼪨󼪪󼪫󼪬 5:  -  
      ,             
    
  :    (   )    
 
: ,      
      :
     
         
     
   ,              
     ,       
󻚠󻚡󻚢󻚣󻚤󻚥󻚦󻚧󻚫󻚨󻚩󻚪󻚬󻚭󻚮󻚯 6:  -   
                 
   
  :       
:,      
               
           
         -   
󻥡󻥢󻥣󻥤󻥥󻥦󻥧󻥨󻥩 : 
   -   
 ,         (      ), 
    
           
Easy2Siksha.com
:         
             ,     

󼨽󼨾󼨿󼩁󼩀 : pH 
-           , pH 
         
:           
󷃆󺡌󺡍 :   
     ,           
,       ,      
         ,    
     
󷇴󷇵󷇶󷇷󷇸󷇹 :     
            :
1.  -   .
2. -   
3.   -      
4. -     
5.   
6. -  
7. (

)-   
8. (

)    
9.        
󷩀󷨹󷨺󷨻󷩁󷩂󷨼󷨽󷨾󷨿   :          
 
Easy2Siksha.com
    ,                 -
  ()               
       :      ,     ,
    ,            ,
                 
     
󺠣󺠤󺠥󺠦󺠧󺠨        ?
  ,       :
   (   )
 
        
  (   )   
󼨐󼨑󼨒:       -   
          -        
        ,         
,   ,          
  ,        ,     -   ,
           
       -      ,       
        
"              
     ,     "