($A$) $\mathrm{BrF}_5$ ($B$) $\mathrm{ClF}_3$ ($C$) $\mathrm{XeF}_4$ ($D$) $\mathrm{SF}_4$
- A$A,C$
- ✓$B,C$
- C$C,D$
- D$B,C,A$
($A$) $\mathrm{BrF}_5$ ($B$) $\mathrm{ClF}_3$ ($C$) $\mathrm{XeF}_4$ ($D$) $\mathrm{SF}_4$
$C$ $XeF_ 4$
$ClF _3$ and $XeF _4$ contain two lone pairs of electrons on the central atom.
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$[A]$ With increase in temperature, the value of $K$ for exothermic reaction decreases because entropy change of the system is positive
$[B]$ With increase in temperature, the value of $K$ for endothermic reaction increases because unfavourable change in entropy of the surroundings decreases
$[C]$ With increase in temperature, the value of $K$ for endothermic reaction increases because the entropy change of the system is negative
$[D]$ With increase in temperature, the value of $K$ for exothermic reaction decreases because favourable change in entropy of the surrounding decreases
Reason : trans-Compound in trans addition forms two types of stereoisomers.