CBSE Class 10 Science Question Paper SA 1 2011 (13)

CBSE Class 10 Science Question Paper 2012 (13). 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.

SUMMATIVE ASSESSMENT - I (2011)

 SCIENCE Class – X 

SECTION-A 

1. How is a voltmeter connected in a circuit ?

2. An element X forms an oxide which turns red litmus blue. Identify whether X is a metal or non–metal.

3. Write the full form of CNG.

4. Name the instrument used for measuring :

   (i) Potential difference

   (ii) Current 

5. Using the electronic configurations, explain how Magnesium atom combines with Oxygen atom to form magnesium oxide by transfer of electrons.

6. How will you prove that a given salt is a carbonate of a metal ?

7. Respiration is considered an exothermic reaction. Explain why ?

8. What is translocation ? How it take place in plants ?

9. List any two disadvantage of using fossil fuels ?

10. Two electric bulbs A and B are marked 220 V, 40 W and 220 V, 60 W respectively. Which one of the two has the filament of larger resistance ? Give reason for your answer.

11. A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. State the direction of magnetic field. Which rule did you use to find the direction? State the rule.

12. A 9 ohm resistance is cut into three equal parts and connected in parallel. Find the equivalent resistance of the combination.

13. (a) Oil and fat containing food items are flushed with nitrogen while packing them why ?

     (b) Why do we apply paint on iron articles ? 

14. Name the gas that liberates when an acid reacts with a metal. Illustrate your answer with an example giving the balanced equation for the reaction involved. How would you test the gas evolved ?

15. (a) State in brief the method of preparation of bleaching powder. Give a balanced chemical equation for the reaction involved.

      (b) Bleaching powder is used for disinfecting drinking water give reason. 

Please click the link below to download pdf file of CBSE Class 10 Science Question Paper SA 1 2011 (13)