Question

Assertion: Calcium carbonate when heated gives calcium oxide and water. 1

Reason: On heating calcium carbonate, decomposition reaction takes place.



15. Assertion: In food chain top consumers have high amount of harmful 1

chemicals.

Reason: These chemicals are not degradable & get accumulated progressively

at each trophic level.

16. Assertion: Humans have two different sex chromosomes, X and Y. 1

Reason: male offspring will inherit X chromosome from either of its parents.​

Answer 1

Answer:

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Answer 2

Explanation:

Assertion: Calcium carbonate when heated gives calcium oxide and water. 1

Reason: On heating calcium carbonate, decomposition reaction takes place.

15. Assertion: In food chain top consumers have high amount of harmful 1

chemicals.

Reason: These chemicals are not degradable & get accumulated progressively

at each trophic level.

16. Assertion: Humans have two different sex chromosomes, X and Y. 1

Reason: male offspring will inherit X chromosome from either of its parents.