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Question

The sum of the oxidation number of the carbon atoms in CH3CHO is:

A
2
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B
+2
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C
4
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D
1
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Solution

The correct option is A 2
Let x be the sum of the oxidation states of carbon atoms in acetaldehyde (CH3CHO).

The oxidation numbers of hydrogen and oxygen are +1 and 2 respectively.

Let, x be the sum of the oxidation state of C.
For a neutral molecule, the sum of the oxidation numbers of all the molecules is zero.

Hence, x+4×(+1)+(2)=0 or, x=2.

Hence, the correct option is A

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