MCQ
General formula of alkyne is
- A${C_n}{H_{2n + 2}}$
- B${C_n}{H_{2n}}$
- ✓${C_n}{H_{2n - 2}}$
- D${C_n}{H_n}$
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$(A)$ $SnCl _2 \cdot 2 H _2 O$ is a reducing agent.
$(B)$ $SnO _2$ reacts with $KOH$ to form $K _2\left[ Sn ( OH )_6\right]$.
$(C)$ A solution of $PbCl _2$ in $HCl$ contains $Pb ^{2+}$ and $Cl ^{-}$ions.
$(D)$ The reaction of $Pb _3 O _4$ with hot dilute nitric acid to give $PbO _2$ is a redoxreaction.