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Q.

Assertion (A): Silver articles becomes black after some time when exposed to air.

Reason (R): It reacts with oxygen in the air to form a coating of silver oxide

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a

‘A’ and ‘R’ are correct and ‘R’ is the correct explanation of ‘A’

b

‘A’ and ‘R’ are correct, but ‘R’ is not the correct explanation of ‘A’

c

‘A’ is true but ‘R’ is false

d

Both ‘A’ and ‘R’ are false

answer is C.

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Detailed Solution

Assertion : True

Reason: It reacts with H2S  forming Ag2S  (black) not Ag2O .

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Assertion (A): Silver articles becomes black after some time when exposed to air. Reason (R): It reacts with oxygen in the air to form a coating of silver oxide