Question

Number of valence electrons present in a ${HClO}_4,{HClO}_3,{HClO}_2$ respectively are:

• A. 32, 26, 20
• B. 26, 20, 14
• C. 36, 30, 24
• D. 28, 22, 16

Answer 1

Answer: (A)

32, 26, 20

Elements	No. of valence electron
H	1
Cl	7
O	6

$HCl{O}_4\Rightarrow$ (Refer to Image 1) Total valence $e^{-}=4\ast 6+7+1=32$

$HCl{O}_3\Rightarrow$ (Refer to Image 2) Total valence $e^{-}=3\ast 6+7+1=26$

$HCl{O}_2\Rightarrow$ (Refer to Image 3) Total valence $e^{-}=2\ast 6+7+1=20$