CBSE Class 10 Science Sample Paper Set D

SECTION-A

1 Define reflex action.

2 The power rating of an appliance is 100W - 250V. What does it indicate?

3 Write the name of the substance whose vapours are used to run the turbine of the generator of ocean thermal energy plant ?

4 The pH of soil A is 7.5 while that of soil B is 4.5. Which of the two soils A or B should be treated with powdered chalk to adjust its pH and  why ? 

5 Define the term alloy. Give two advantages of making alloys.

6 (i) Name two organisms that obtain food through parasitic nutritive strategy.

  (ii) How do fungi obtain their food ?

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