Which of the following is not correctly match | vedclass

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(C) $1$. Thermal stability of alkali metal peroxides increases down the group due to the increase in the size of the cation,which stabilizes the large

Vedclass · Accepted Answer

$NaF < NaCl < NaBr < NaI$ : $mpt$ order

Vedclass · Answer

(C) $1$. Thermal stability of alkali metal peroxides increases down the group due to the increase in the size of the cation,which stabilizes the large peroxide anion. Thus,$Na_2O_2 $2$. Thermal stability of alkali metal bicarbonates increases down the group because the lattice energy increases as the size of the cation increases. Thus,$LiHCO_3 $3$. In $NaF, NaCl, NaBr, NaI$,the anion size increases,which leads to a decrease in lattice energy. Therefore,the melting point $(mpt)$ order should be $NaF > NaCl > NaBr > NaI$. The given order $NaF $4$. According to Fajan's rule,as the charge on the cation increases $(Na^+  MgCl_2 > AlCl_3$ is correct.

List-$I$	List-$II$
$(a)$ $Li$	$(i)$ Poor water solubility of $I^{-}$ salt
$(b)$ $Na$	$(ii)$ Most abundant element in cell fluid
$(c)$ $K$	$(iii)$ Bicarbonate salt used in fire extinguisher
$(d)$ $Cs$	$(iv)$ Carbonate salt decomposes easily on heating

Which of the following is not correctly matched?

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