MCQ
In an ionic compound $A^+ X^-$ the degree of covalent bonding is greatest when
- A$A^+$ and $X^-$ ion are small
- ✓$A^+$ is small and $X^-$ is large
- C$A^+$ and $X^-$ ions are approximately of the same size
- D$X^-$ is small and $A^+$ is large
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$A$. A liquid evaporates to vapour.
$B$. Temperature of a crystalline solid lowered from $130 \mathrm{~K}$ to $0 \mathrm{~K}$.
$C$. $2 \mathrm{NaHCO}_{3(\mathrm{~s})} \rightarrow \mathrm{Na}_2 \mathrm{CO}_{3(\mathrm{~s})}+\mathrm{CO}_{2(\mathrm{~g})}+\mathrm{H}_2 \mathrm{O}_{(\mathrm{g})}$
$D$. $\mathrm{Cl}_{2(g)} \rightarrow 2 \mathrm{Cl}_{(g)}$
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