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When 2.76 g of silver carbonate is stron...

When `2.76 g` of silver carbonate is strongly heated, it yields a residue weighing

A

`2.16 g`

B

`2.48 g`

C

`2.32 g`

D

`2.64 g`

Text Solution

Verified by Experts

The correct Answer is:
A
Unlike other metal carbonates that usually decomposes into metal oxides liberating carbon dioxide, silver carbonate on heating decomposes into elemental silver liberating mixture of carbon dioxide and oxygen gas as :
`Ag_(2)CO_(3)(s) overset("Heat")rarr 2Ag(s) + CO_(2)(g) + (1)/(2)O_(2)(g)`
`MW = 276 g " " 2 xx 108 = 216 g`
Hence, `2.76 g` of `Ag_(2)CO_(3)` on heating will give
`(216)/(276) xx 2.76 = 2.16g Ag` as residue.
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