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Question

Which of the following compounds will given racemic mixture on nucleophilic substitution by OH ion?
(a) CH3CH|C2H5Br
(b) CH3Br|C|C2H5CH3
(c) CH3CH|C2H5CH2Br

A
(a)
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B
(a),(b),(c)
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C
(b),(c)
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D
(a),(c)
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Solution

The correct option is A (a)
C: 1 Alkyl halide can directly forms substitution product without inversion.
B: 3 Alkyl halide allows OH to attack only from one side d after leaving of halide OH attacks due steric hinderance.
A: 2 Alkyl halide allows OH to attack while leaving of Br hence inversion of molecule occurs forms racemic mixture.

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