question_answer

The number of unpaired electrons in the p-subshell of oxygen atom is [Kurukshetra CEE 1991]

A) 1

B) 2

C) 3

D) 4

Correct Answer: B

Solution :

\[{{O}_{8}}\] `     \[1{{s}^{2}}\]     \[2{{s}^{2}}\]     \[KI+{{H}_{2}}S{{O}_{4}}\,\xrightarrow{\Delta }\,KHS{{O}_{4}}+HI\]