Assertion (A): Silver articles become black after sometime when exposed to sunlight. Reason (R) : It is because Silver reacts with carbonates present in the air.

Question

Assertion-ReasonCorrosion of Metals Due to Environmental FactorsCBSE PYQ

State giving reason the reduction process to obtain the following metals from their compounds :

State giving reason for the change in appearance observed when each of the following metal is exposed to atmospheric air for some time :