Question
Find the oxidation number of Cl in ClO _4^ -1
MHT CET
Chemistry
Redox Reactions
2026
MHT CET 2026 (11 April Shift 2)
MHT CET Chemistry Question (2026) — Solution
Options
- A. -9
- B. +7
- C. -7
- D. +9
Answer
B. +7
Step-by-step solution
Let the oxidation number of Cl be x. The oxidation number of oxygen is generally -2. The sum of oxidation numbers of all atoms in a polyatomic ion is equal to its net charge. x + 4(-2) = -1 x - 8 = -1 x = +7 Answer: +7
Related: Chemistry — Redox Reactions · All PYQ Banks