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Question

By which of the following reagents, butanoic acid can be converted into butane?


A
Red P/HI
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B
NaOH/CaO
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C
CH3MgBr
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D
All of these
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Solution

The correct option is B Red P/HI
Butanoic acid can be converted to butane by heating with hydriodic acid $$(HI)$$ and red phosphorus $$(Red\ P)$$. 

$$\underset{\  \\  butanoic\ acid}{CH_3-CH_2-CH_2-COOH}+6HI\xrightarrow[150^oC]{Red\ P}\underset{\ \\  butane}{CH_3-CH_2-CH_2-CH_3}+2H_2O+3I_2$$

$$\mathbf{Hence\ the\ correct\ answer\ is\ option\ (A)}$$

Chemistry

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