Question

a) Both A and R are true, and R is correct explanation of the assertion.
b) Both A and R are true, but R is not the correct explanation of the assertion.
c) A is true, but R is false.
d) A is false, but R is true.

Assertion:Copper is kept open in air, it slowly loses its shining brown surface
and gains a green coating
Reason:Copper is highly reactive metal

Answer 1

Answer:

There is plenty amount of carbon dioxide gas present in our atmosphere which reacts with the external copper surface. In this chemical reaction,a green coloured chemical substance is produced which is also known as the copper carbonate.

Explanation:

so option c I think .....

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