MCQ
Silver nitrate produces a black stain on skin due to
- ABeing a strong reducing agent
- BIts corrosive action
- CFormation of complex compound
- ✓Its reduction to metallic silver
$2AgN{O_3}\, \to \,\mathop {2Ag}\limits_{{\rm{black stain}}} + {N_2} + 3{O_2}$
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| List$-I$ (Oxoacids of Sulphur) | List$-II$ (Bonds) |
| $A$. Peroxodisulphuric acid | $I$. Two $S - OH$, Four $S = O$, One $S - O - S$ |
| $B$. Sulphuric acid | $II$. Two $S - OH$, One $S = O$ |
| $C$. Pyrosulphuric acid | $III$. Two $S - OH$, Four $S = O$, One $S - O - O - S$ |
| $D$. Sulphurous acid | $IV$. Two $S - OH$, Two $S = O$ |
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