Question

The bond dissociation energies for single covalent bonds formed between carbon and $A,B,C,D$ and $E$ atoms are:

Bond	Bond energy $kcal{mol}^{-1}$
(i) $C-A$	$240$
(ii) $C-B$	$382$
(iii) $C-D$	$276$
(iv) $C-E$	$486$

This indicates that the smallest atom is:

• A. $A$
• B. $B$
• C. $C$
• D. $E$

Answer 1

The correct option is D $E$

$C-E$ bond has highest bond energy; it means that the covalent bond $C-E$ will be strongest. Smaller is the size of atom, stronger is the covalent bond.