The decreasing base strength of OH−,NH−2,HC≡C−andCH3CH−2 is:
A
CH3CH−2>NH−2>HC≡C−>OH−
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B
HC≡C−>CH3CH−2>NH−2>OH−
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C
OH−>NH−2>HC≡C−>CH3CH−2
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D
NH−2>HC≡C−>OH−>CH3CH−2
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Solution
The correct option is ACH3CH−2>NH−2>HC≡C−>OH− The conjugate acid are H2O,NH3,HC≡CHandCH3CH3.Their order of acid strength is CH3CH3<NH3<HC≡CH<H2O.Their conjugate base follows reverse order.