Question

The decreasing order of $-I$ effect of the orbitals is:
I. $sp$
II. $s{p}^2$
III. $s{p}^3$

• A. I > II > III
• B. III > II > I
• C. I > III > II
• D. II > III > I

Answer 1

The correct option is A I > II > III

More the 's' character, more is electron withdrawing effect.
$sp\to \left(50\%\right)$ s character
$s{p}^2\to \left(33.33\%\right)$ s character
$s{p}^3\to \left(25\%\right)$ s character
Hence the order is: $I>II>III$