Question

1. The oxidation number of Cl in NOClO4, is
a. +11
b. +9
c. +7
d. +5​

Answer 1

Answer:

+11

I hope this is wright.

Answer 2

Answer:

+7

Explanation:

Since ClO4 has a 1- charge, and we know each Oxygen's oxidation state is usually 2-, four oxygens amount to 8-. As the final charge of the perchlorate ion is 1-, that means Cl must have a positive charge of +7 to balance the negatives (ie 7-8 = -1)