Which one is the correct order of acidity?

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(A) The acidity of hydrocarbons depends on the hybridization of the carbon atom attached to the acidic hydrogen. The order of electronegativity of car

Vedclass · Accepted Answer

$CH \equiv CH > CH_3-C \equiv CH > CH_2=CH_2 > CH_3-CH_3$

Vedclass · Answer

(A) The acidity of hydrocarbons depends on the hybridization of the carbon atom attached to the acidic hydrogen. The order of electronegativity of carbon is $sp > sp^2 > sp^3$. $CH \equiv CH$ ($sp$ hybridized) is the most acidic. $CH_3-C \equiv CH$ ($sp$ hybridized) is less acidic than $CH \equiv CH$ due to the $+I$ effect of the methyl group. $CH_2=CH_2$ ($sp^2$ hybridized) is less acidic than alkynes. $CH_3-CH_3$ ($sp^3$ hybridized) is the least acidic. Therefore,the correct order is $CH \equiv CH > CH_3-C \equiv CH > CH_2=CH_2 > CH_3-CH_3$.

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