Q.

Which of the following compound gives a higher alkene when heated with ethanolic zinc dust

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a

CH3-CHBr2

b

BrCH2-CH2Br

c

BrCH2-CH2-CH2Br

d

All of these

answer is A.

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Detailed Solution

1....CH3-CHBr2+2Znalc+CH3-CHBr2 →∆ 2-butene; 3....gives cyclopropane; 2.....CH2Br-CH2Br→Zn/ethanolCH2=CH2;
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