CBSE Class 10 Science Question Paper SA2 2010 (2)

CBSE Class 10 Science Question Paper SA 2 2010 (2). 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.      N₂+3H₂ → 2NH₃, name the type of reaction.                                                   

2.      Why do we apply paint on iron articles ?                                                    

3.      Name the device  which  directly  converts solar  energy into electrical  energy.           

4.      Name the instrument  used to measure electric  current in a circuit.                        

5.      Explain why most of the metals do not displace hydrogen from Nitric acid.                   

6.      What is bleaching powder ? How is it prepared ?  State two uses of bleaching powder.

7.      What is  neutralisation  reaction  ?  Give  one example.                                    

8.     A white  solid  when dropped in water produces a hissing  sound.  What the solid  may be ?  Give the chemical reaction for above. Name the product formed.

9.      How are the fats digested in our bodies where does this process take place ?                

10.   Out of two solar cookers one was covered by a plane glass slab and other was left open, which  of two solar  cookers will be more efficient  and why.

11.   What is the (a) highest (b) lowest resistance that can be secured by combining four coils of resistance 4 Ω, 8 Ω, 12 Ω, and 24 Ω

12.   What is  meant  by the term magnetic  field  lines  ? List  any two properties  of magnetic  field lines.

13.   An electric bulb draws a current of 0.8A and works on 250 V on the average 8 hours a day,  If energy costs Rs 3 per kWh.  Calculate monthly bill for 30 days.

14.   Take 2g silver chloride in a china dish and place it in sunlight :                            

(a)    observe the colour of silver chloride after some time. 

(b)    what type of reaction  takes place ?

(c)    write the chemical  reaction  for above observation.

Please click the link below to download pdf file of CBSE Class 10 Science Question Paper SA 2 2010 (2).