CBSE Class 10 Science Question Paper SA2 2010 Set 05

CBSE Class 10 Science Question Paper SA 2 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.      Name a Non-metal which is lustrous and a metal which is Non-lustrous.

2.      Balance the following  chemical equations :

          Pb(N0₃)_2 (s) -Heat →  Pb0_(s) + N0_{2 (g)} + 0_{2 (g)}

3.      Define 0hm's  Law.

4.      With the help of a suitable example, explain 0xidation and Reduction in terms of gain or loss of oxygen

5.      What is green house effect ?

6.      Respiration is considered as exothermic reaction.  Explain why ?

7.      Name the chemicals used in the Acid Fire extinguisher and the gas evolved from it when used ?

8.  Explain why  Calcium metal after reacting with  water starts floating on its surface ? Write the chemical equation for the reaction.

9.  A wire is cut into three equal parts and then connected in parallel.  How will   its :

  (a)  resistance           (b)    resistivity  get effected ?

10. Calculate the resistance of a conductor when the current flowing  through it is 0.2 Aand the potential difference is 0.8 V ?

11.   How is the process of transpiration useful to plant ?

12.   How  does the strength of the Magnetic field at the centre of a circular coil of a wire depend on

(a)    radius of the coil                            (b)    number of turns of wire in the coil

13.   What are exothermic and endothermic reaction. Explain with the help of one example each.

14.   What are the disadvantage of using fossil fuels ?

Please click the link below to download pdf file of CBSE Class 10 Science Question Paper SA 2 2010 (5).