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Q.

In which of the following reactions 1,3-butadiene will be obtained as a major product ?

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a

H2C=CH−C≡CH→H2(1mole)Ni2B

b

All of these

c

HO−CH2−CH2−CH2−CH2−OH→Conc. H2SO4

d

Br−CH2−CH2−CH2−CH2−Br→(CH3)3COHCH33COK(2mole)

answer is D.

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Detailed Solution

In (a) E2 reaction take place.
In (b) dehydration take place.
In (c) alkyne is more reactive than alkene toward catalytic reductions.

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