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Question

The major products obtained in the reaction of oxalic acid with $$conc. H_{2}SO_{4}$$ upon heating are ____________.


A
CO,CO2,H2O
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B
CO,SO2,H2O
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C
H2S,CO,H2O
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D
HCOOH,H2S,CO
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Solution

The correct option is D $$CO, CO_{2}, H_{2}O$$
Conc. sulphuric acid is a strong dehydrating agent. Upon reaction with oxalic acid at elevated temperature, it removes water, carbon monoxide and carbon dioxide as
$$\underset { hydrated\quad oxalic\quad acid }{ HOOC-COOH.2{ H }_{ 2 }O } +\underset { hot,\quad conc. }{ { H }_{ 2 }S{ O }_{ 4 } } \rightarrow 3\underset { water }{ { H }_{ 2 }O } +\underset { carbon\quad monoxide }{ CO } +\underset { carbon\quad dioxide }{ C{ O }_{ 2 } } $$
Therefore, option A is correct.

Chemistry
NCERT
Standard XII

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