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Q.

Among the following which can decolourise Br2 water and also reacts with molten sodium metal?

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a

CH2 = CH2

b

CH3 - C C - CH3

c

d

CH3 - C CH

answer is D.

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Detailed Solution

Terminal alkynes decolourises the Br2 water and exhibits acidic strength.R-C≡C-H+2Br2Orange red colour→CCl4RBr2C-CBr2RColourless R-C≡C-H→NaR-C≡C-Na+ +12H2

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Among the following which can decolourise Br2 water and also reacts with molten sodium metal?