Question

In case of ch3cooh the oxidation number of carbon of carboxylic group is

Answer 1

CH3COOH

4+1×3+C+(-2)+(-2)+1=0
4+C=0
C=-4

Oxidation no of C is minus 4

Answer 2

In $CH_3COOH$, the oxidation number of carbon of carboxylic group is -3.

Explanation:

• In the given compound there are 2 carbons. One carbon is attached with three hydrogen atoms, whereas the other carbon is attached with 2 oxygen atoms and one hydrogen atom.
• As per the general rule, hydrogen acquires +1 charge when it is attached with a non-metal, whereas oxygen acquires -2 charge when it is attached with a non-metal.
• The structure of the carboxylic group given in the attachment is observed, it shows that the 2 oxygen atoms are attached to the carbon (non-metal) and one hydrogen atom is attached to oxygen (non-metal) atom.
• When calculation is done as per the structure it gives:

COOH

Let the oxidation number of carbon in carboxylic acid be "X"

X = (-2)+(-2)+1

X = (-4) + 1

X = -3

∴ From the above calculation it is inferred that the oxidation number of carbon of the carboxylic group is -3.

Learn more about oxidation number

Calculate the oxidation oxidation number of underlined atoms.

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2. HNO3

3. H3PO3

4. K2C2O4

5. H2S4O6

6. Cr2O7

7. NaH2pO7

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The oxidation number of arsenic atom in H3AsO4 is :

(A) –5

(B) +1

(C) –3

(D) +5

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