Which of the following facts is directly explained by the statement '$O$ is a smaller atom than $S$?'

Which of the following pairs does not contain isoelectronic species?

The ionization enthalpy of $Na^{+}$ formation from $Na_{(g)}$ is $495.8 \ kJ \ mol^{-1},$ while the electron gain enthalpy of $Br_{(g)}$ is $-325.0 \ kJ \ mol^{-1}$. Given the lattice enthalpy of $NaBr_{(s)}$ is $-728.4 \ kJ \ mol^{-1}$. The energy for the reaction $Na_{(g)} + Br_{(g)} \rightarrow NaBr_{(s)}$ is $(-) \dots \dots \dots \dots \dots \times 10^{-1} \ kJ \ mol^{-1}$.

$S-O$ bond length is maximum in

Which of the following statements is correct?

Choose the correct order for the given property.
$M.P. \to$ Melting Point; $S \to$ Solubility