CBSE Class 10 Science Question Paper SA 1 2011 (8)

CBSE Class 10 Science Question Paper SA 1 2011 (8). 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. Write a balanced chemical equation for the burning of magnesium in air.

2. Why do we apply paint on iron articles ?

3. What are the two disadvantages of burning fossil fuels ?

4. State in brief the meaning of an electric circuit.

5. An aluminium can is used to store ferrous sulphate solution. It is observed that in a few days holes appeared in the can. Explain the cause for this observation and write chemical equation to support your answer.

6. A person is suffering from indigestion due to the intake of hot spicy food. What remedy will you prescribe to the patient ? Give the name of a chemical that can give relief to him.

7. What would you observe when zinc is added to a solution of iron sulphate ? Name the type of reaction and write the chemical equation.

8. Write an equation each for decomposition reaction when energy is supplied in the form of : (i) heat and (ii) light.

9. Draw a labelled diagram to show nutrition in amoeba. Give one more example of unicellular organism.

10.  (a) Hydrogen is used as rocket fuel. Why ?

       (b) List two limitations of using solar cookers.

11. State the relationship between 1 ampere and 1 volt.

12. Why is it not advisable to handle domestic electrical circuit with wet hands ?

13. Name the property by virtue of which two conductors having identical structures offer different resistances to the flow of current when connected to the same source of electric current.

14. When is a chemical reaction categorised as a precipitation reaction ? Explain with two examples.

15. A white coloured powder is used by the doctors for supporting fractured bones.

       (a) Write chemical name of the powder.

       (b) Write its formula.

       (c) Write chemical equation, when this white powder is mixed with water. 

16. Compounds such as alcohols and glucose also contain hydrogen, but are not categorized as acids. Describe an activity to prove it.

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