Question

In which of the above compounds, the indicated bond is of greater strength?

• A. I
• B. II
• C. Both are equal
• D. Cannot determine

Answer 1

The correct option is A I

$s{p}^2$ carbon atom is more electronegative than $s{p}^3$ carbon atom. The electronegativity difference between $s{p}^2$ carbon atom and bromine atom is less than the electronegativity difference between $s{p}^3$ carbon atom and bromine atom.
Hence, the extent of sharing of electron pair in the bond between $s{p}^2$ carbon atom and bromine atom is more than the extent of sharing of electron pair in the bond between $s{p}^3$ carbon atom and bromine atom.
So, the bond between $s{p}^2$ carbon atom and bromine atom is stronger than the bond between $s{p}^2$ carbon atom and bromine atom.