MCQ
Which cation has smallest radius
- A${K^ + }$
- B$N{a^ + }$
- C$L{i^ + }$
- ✓$B{e^{2 + }}$
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$(A)$ $q=0$ $(B)$ $T_2=T_1$ $(C)$ $P_2 V_2=P_1 V_1$ $(D)$ $P_2 V_2^\gamma=P_1 V_1^\gamma$
$X$ and $Y$ respectively are :

$(I)$ $ Ph -COCH_3$
$(II)$ $CH_3 -CO -CH_3$
$(III)$ $CH_3 -CHO$
$(IV)$ $Ph -COCH_2 -CH_3$
