Which cannot be prepared in a single step from $C_{2} H_{5} I$ ?

C_{2} H_{5} O H

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C_{2} H_{5} O C_{2} H_{5}

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C_{4} H_{10}

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C H_{3} C H_{2} C O O H

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Solution

The correct option is D $C H_{3} C H_{2} C O O H$
Among all given options, acid can not be prepared in single step from alkyl halide, as it requires at least two steps to complete the process.

The reaction of acid preparation is as follows:

$C_{2} H_{5} I K C N - -- \to - K I C_{2} H_{5} C N H_{2} O - - \to C H_{3} C H_{2} C O O H$

Option D is correct.

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