Which of the following set of reaction can prepare
as the final product ?
(where R is either alkyl or aryl group)
1. $R - M g X + O = C = O d r y . e t h e r - ---- \to A H_{3} O^{+} - -- \to$
2. $R - C N S n C l_{2} / H C l - ------ \to (i i) H_{2} O / H^{+}$
3. 4. $C H_{3} (C H_{2})_{8} C H_{2} O H C r O_{3} - --- \to H_{2} S O_{4}$

1, 2 and 3

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2, 4 only

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1, 3 and 4

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All four

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Solution

The correct option is C 1, 3 and 4
a)
So, this can produce $R - C O O H$ .

b) $R - C N S n C l_{2} / H C l - ------ \to (i i) H_{2} O / H^{+} R C H O$
c)
d)
Hence, the correct answer is option (c).

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