Question
The unit representing atomic radii and ionic radii is
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Compound $(B)$ is
$H_3PO_4$ $\xrightarrow{{600\,{\,^o}C}}(Y)$
$(X)$ and $(Y)$ is
Statement $I:$ On heating with $KHSO _{4}$, glycerol is dehydrated and acrolein is formed.
Statement $II:$ Acrolein has fruity odour and can be used to test glycerol's presence.Choose the correct option.
$[I]$ Only $A, B$ and $C$ react with $1\,M\,HCl$ to give $H_2\,(g)$
$[II]$ When $C$ is added to solutions of the other metal ions, metallic $B$ and $D$ are formed.
$[III]$ Metal $C$ does not reduce $A^{n+}$