Question

what is the hybridization of the indicated atoms?
a. i: sp², ii: sp²
b. i: sp², ii: sp³
c. i: sp³, ii: sp²
d. i: sp³, ii: sp³

Explanation:

Step1: Analyze atom I

Atom I is part of a benzene - like ring and has a double - bond. In such a case, the atom is $sp^{2}$ hybridized as it has 3 regions of electron density (two $\sigma$ - bonds and one $\pi$ - bond).

Step2: Analyze atom II

Atom II is a saturated carbon atom (has four single - bonds). A saturated carbon atom has 4 regions of electron density and is $sp^{3}$ hybridized.

Answer:

B. $sp^{2}$, $sp^{3}$