Which one of the following reacts with conc. `H_2SO_4`?
Which one of the following reacts with conc. `H_2SO_4`?
A. Au
B. Ag
C. Pt
D. Pb
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Correct Answer - B
`2Ag + 2H_2SO_4 overset"conc."to Ag_2SO_4 + SO_2 + 2H_2O`
Au and Pt - inert , `PbSO_4` is insoluble .
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