Assertion :Spot of iron-rusting can be removed by addition of oxalic acid. Reason: Removed by addition of acetic acid.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Iron (III) ions from rust and oxalic acid react to form ferric oxalate $([F e (C_{2} O_{4})_{3}]^{3 -})$ which is water soluble.
Hence, the spot of iron-rusting can be removed by addition of oxalic acid.

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Assertion :Spot of iron-rusting can be removed by addition of oxalic acid. Reason: Removed by addition of acetic acid.

The correct option is C Assertion is correct but Reason is incorrectIron (III) ions from rust and oxalic acid react to form ferric oxalate ([Fe(C2O4)3]3−) which is water soluble.Hence, the spot of iron-rusting can be removed by addition of oxalic acid.

The correct option is C Assertion is correct but Reason is incorrect
Iron (III) ions from rust and oxalic acid react to form ferric oxalate $([F e (C_{2} O_{4})_{3}]^{3 -})$ which is water soluble.
Hence, the spot of iron-rusting can be removed by addition of oxalic acid.