How many of the following underlined atoms have different oxidation number? H_2S_2O_3, H_2S_4O_6, CaOCl_2, CrO_5, CrO_3, [Fe_2(CN)_6]^-

JEE Main Chemistry question

How many of the following underlined atoms have different oxidation number?

, , , , ,

Answer: 5

The question refers to specific 'underlined' atoms in each formula, but no underline marking is available, and species such as contain more than

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Question ID VK-145331