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

Red P/HI

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NaOH/CaO

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C H_{3} M g B r

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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 $(H I)$ and red phosphorus $(R e d P)$ .

$C H_{3} - C H_{2} - C H_{2} - C O O H b u t a n o i c a c i d + 6 H I R e d P - -- \to 150^{o} C C H_{3} - C H_{2} - C H_{2} - C H_{3} b u t a n e + 2 H_{2} O + 3 I_{2}$

$H e n c e t h e c o r r e c t a n s w e r i s o p t i o n (A)$

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