• # 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

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