Which is not a method of preparing carbon monoxide on a commercial scale?

C_{(} S) + H_{2} O_{(} g) 473 - 1273 K - ------ \to C O_{(} g) + H_{2 (g)}

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2 C_{(} s) + O_{2 (g)} + 4 N_{2 (g)} 1273 K - --- \to 2 C O_{(} g) + 4 N_{2 (g)}

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2 C_{(} s) + O_{2 (g)} △ - \to 2 C O_{(} g)

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H C O O H 373 K - ------ \to c o n c . H_{2} S O_{4} H_{2} O + C O

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Solution

The correct option is D $H C O O H 373 K - ------ \to c o n c . H_{2} S O_{4} H_{2} O + C O$
Formic acid is used for producing carbon monoxide on a small scale. Formic acid on dehydration gives carbon monoxide.

$H C O O H 373 K - ------- \to c o n c . H_{2} S O_{4} H_{2} O + C O$

Thus, it cannot be used for preparing carbon monoxide on a commercial scale.

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