CBSE Class 10 Science Question Paper SA1 2010 (5)

CBSE Class 10 Science Question Paper SA 1 2010 (5). Students can download the last year question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

SECTION  - A

1.      Why should solar cookers are to be covered with glass plate ?                               

2.      Define electric  circuit.  Distinguish  between open and closed  circuit.                   

3.      Name two metals which  have very low melting  point.                                        

4.      What is meant by skeletal equation ? 

5.   (a)    What material is used in making the filament of an electric bulb ?                   

     (b)    Name the characteristics  which  make it suitable  for this.

6.      Two electric bulbs A and B are marked 220V, 40W and 220V, 60W respectively.  Which   one of the two has greater resistance  ?

7.      Differentiate  overloading  and short circuiting. 

8.      Write any two advantages of using  Biogas.  

9.      Mention the components of the transport system in highly organized plants.  State the   functions  of these components.

10.   What is  meant by thermal decomposition  reaction  ?   Explain with  an example.  

11.   An aluminium can is used to store Ferrous sulphate solution.  It is observed that in few days holes  appeared in the can. Explain the observation  and write chemical  equation to support your answer.

12.   (i)      What do you understand by the term pH of a solution ? 

(ii)    What is the pH of distilled water and common salt solution ?

13.   Aluminium occurs in combined state whereas gold is found in free state. Why ?                 

Please click the link below to download pdf file of CBSE Class 10 Science Question Paper SA 1 2010 (5).