Which of the following is not correctly match | vedclass

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(C) $1$. Thermal stability of alkali metal peroxides $(M_2O_2)$ increases down the group due to the increase in the size of the cation,which stabilize

Vedclass · Accepted Answer

$NaF < NaCl < NaBr < NaI$ (Melting point order)

Vedclass · Answer

(C) $1$. Thermal stability of alkali metal peroxides $(M_2O_2)$ increases down the group due to the increase in the size of the cation,which stabilizes the peroxide ion. Thus,$Na_2O_2 $2$. Thermal stability of alkali metal bicarbonates $(MHCO_3)$ increases down the group as the lattice energy increases with the size of the cation. Thus,$LiHCO_3 $3$. Melting point of alkali metal halides $(MX)$ decreases as the size of the anion increases (polarizability increases,leading to more covalent character). Thus,the order should be $NaF > NaCl > NaBr > NaI$. The given option $NaF $4$. According to Fajan's rule,as the charge on the cation increases $(Na^+  MgCl_2 > AlCl_3$ is correct.

Which of the following is not correctly matched?

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