Question

Arrange stability of the given carbocations in decreasing order

• A. iii > ii > i > iv
• B. i > ii > iii > iv
• C. iii > ii > iv > i
• D. ii > iii > i > iv

Answer 1

The correct option is C iii > ii > iv > i

More the -R effect ,more is the unstability.
$-CHO$ shows -R effect so (i) is the least stable
More the +R effect, more is the stability
. $-N{H}_2,-Cland-OH$ are electron donating groups. The order of electron donating groups are
$-N{H}_2>-OH>-Cl$.
Correct order is option (c)