Question

Q21. Assertion - Calcium oxide (Slaked lime), is used in white washing of walls. Reason-Calcium hydroxide reacts with Co2 to form a thin layer of Calcium carbonate on the walls. *

Both assertion and reason are CORRECT and reason is THE CORRECT EXPLANATION of assertion

O Both assertion and reason are CORRECT,but reason is NOT THE CORRECT explanation of the assertion

Assertion is CORRECT, but reason is INCORRECT

O Both assertion and reason are INCORRECT.​

Answer 1

Answer:

both are correct

Explanation:

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Answer 2

Answer:

Assertion is INCORRECT, But Reason is CORRECT.

Explanation:

Calcium oxide is called quick lime which is powder in form. it is mixed with water to form calcium hydroxide called slaked lime that is later applied on walls for whitewashing.

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