The electronic configuration of four elements $\mathrm{L}, \mathrm{P}, \mathrm{Q}$ and $\mathrm{R}$ are…

The electronic configuration of four elements $\mathrm{L}, \mathrm{P}, \mathrm{Q}$ and $\mathrm{R}$ are given in brackets
$\mathrm{L}\left(1 \mathrm{~s}^{2}, 2 \mathrm{~s}^{2} 2 \mathrm{p}^{4}ight) ; \mathrm{Q}\left(\mathrm{ls}^{2}, 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6}, 3 \mathrm{~s}^{2} 3 \mathrm{p}^{5}ight)$
$\mathrm{P}\left(\mathrm{ls}^{2}, 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6}, 3 \mathrm{~s}^{1}ight) ; \mathrm{R}\left(\mathrm{ls}^{2}, 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6}, 3 \mathrm{~s}^{2}ight)$
The formulae of ionic compounds that can be formed between these elements are
  1. $L_{2} P, R L, P Q$ and $R_{2} Q$
  2. $L P, R L, P Q$ and $R Q$
  3. $P_{2} L, R L, P Q$ and $R Q_{2}$
  4. $L P, R_{2} L, P_{2} Q$ and $R Q$

Solution

Valencies of $L, Q, P$ and $R$ is $-2,-1,+1$ and $+2$ respectively so they will form $P_{2} L, R L, P Q$ and $R Q_{2}$ *

Asked in: JEE-TOPICTESTS-CHEMISTRY

Practice more CHEMICAL BONDING AND MOLECULAR STRUCTURE questions on Aicharya