CBSE Class 10 Science Question Paper SA2 2010 (1)

CBSE Class 10 Science Question Paper SA 2 2010 (1). 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.      Name two most malleable  metals.                                                            

2.      What is bio-mass ?                                                                          

3.      Name the gas that can be used for storage of fresh sample of chips for a long time.         

4.      Define the  SI unit of resistance ?                                                         

5.      Classify the following salts into acidic basic and neutral. Potassium sulphate, ammonium chloride,  sodium  carbonate, sodium  chlorides

6.      What would  you observe when zinc is added to a solution of iron (II) sulphate. Name  the type of reaction  and write the chemical  equation.

7.      What is an alloy ?  Give the composition and one use each of the following : 

(i)     Brass         (ii)    Solder

8.      Write the balanced chemical  equation  for the following reaction  and write the name  of the reaction  :

Barium chloride  + Aluminium sulphate → Barium sulphate + Aluminium chloride

9.      What do you mean by 'ocean thermal energy' ? How electricity can be generated from  the energy ?

10.   (a)    What will happen to the guard cells  and stomatal pore when water flows to  guard cells ?

(b)    How do plants transit informations from cell to cell ?

11.   Give reason :

(a)    Why tungsten is used for making filament of electric lamps.                                  

(b)    The elements of heating electrical appliances are made up of an alloy rather than  pure metal.

12.   What are permanent magnet and electromagnet  ? Give  two uses of each.                        

13.   Copper wire has resistance  R.  If the wire is  doubled  on it find  the new resistance  in  terms of original resistance ?

Please click the link below to download pdf file of CBSE Class 10 Science Question Paper SA 2 2010 (1).