View PDF CBSE Class 10 Science Sample Paper Solved 2021 Set D

SECTION A   1. Name the sex hormone secreted by male and female sex organs in human beings.    2. Write any two harmful effects of ozone depletion.    SECTION B   3. “Rain water harvesting is essential”. Justify this statement giving two reasons.    4. Give two advantages and disadvantages of harnessing wind energy to produce electricity.                                                           OR   Compare and contrast fossil fuel and energy obtained from the Sun as direct sources of energy.   5. a) Write any two factors could lead to the rise of a new


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