MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

Let the oxidation number of Cl in HOClO _2 (which is HClO _3) be x. The oxidation number of hydrogen ( H ) is +1 and that of oxygen ( O ) is -2. The sum of the oxidation numbers of all atoms in a neutral molecule is zero. +1 + x + 3(-2) = 0 x - 5 = 0 x = +5 The oxidation number of Cl in HOClO _2 is +5. Answer: +5