MHT CET202526 Apr 2025Evening ShiftChemistryRedox ReactionsActual

What is the oxidation number of carbon in methanal?

Options

A-2
B+2
Czero
D+4

Correct answer

C. zero

Step-by-step solution

Oxidation number calculation for methanal (HCHO): In a neutral molecule, the sum of oxidation numbers equals zero. Hydrogen has oxidation number +1 and oxygen -2 in this compound. Let x be the oxidation number of carbon. The sum is: x + 2(+1) + (-2) = 0 Simplifying: x + 2 - 2 = 0 x = 0 The oxidation number of carbon in methanal is 0 .

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