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Q.

Which of the following on heating with concentrated H2SO4, will give carbon monoxide?

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a

COOH | COOH

b

HCOOH

c

Coke

d

both H2C2O4 and HCOOH

answer is D.

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Detailed Solution

When formic acid is heated with sulphuric acid, only CO gas is evolved as it is not a redox reaction.

HCOOH →conc. H2SO4 CO + H2O

Oxalic acid reacts with conc. sulphuric acid to produce a mixture of carbon monoxide, carbon dioxide and water.

(COOH)2​​ + conc.H2​SO4 ​→ CO + CO2 ​+ H2​O

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