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Which one of the following reacts with c...

Which one of the following reacts with conc. `H_2SO_4`?

A

Au

B

Ag

C

Pt

D

Pb.

Text Solution

Verified by Experts

The correct Answer is:
B
Ag reacts with conc. `H_2SO_4`
`({:(H_2SO_4to,H_2O+SO_2+O),(2Ag+H_2SO_4+Oto,Ag_2SO_4+H_2O):})/ul(2Ag+2H_2SO_4to 2H_2O + SO_2 + Ag_2SO_4)`
Pb does not react with conc. `H_2SO_4` . It is due to the formation of insoluble layer of `PbSO_4`
Au and Pt do not react with conc. `H_2SO_4`.
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