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Question: The correct trend of acidic nature of the following alkynes is....

The correct trend of acidic nature of the following alkynes is.

A

CH≡CH>CH3−C≡CH>CH3C≡CCH3\mathrm { CH } \equiv \mathrm { CH } > \mathrm { CH } _ { 3 } - \mathrm { C } \equiv \mathrm { CH } > \mathrm { CH } _ { 3 } \mathrm { C } \equiv \mathrm { CCH } _ { 3 }

B

CH3−C=CH>CH≡CH>CH3C≡CCH3\mathrm { CH } _ { 3 } - \mathrm { C } = \mathrm { CH } > \mathrm { CH } \equiv \mathrm { CH } > \mathrm { CH } _ { 3 } \mathrm { C } \equiv \mathrm { CCH } _ { 3 }

C

CH3C≡CCH3>CH2−C≡CH>CH≡CH\mathrm { CH } _ { 3 } \mathrm { C } \equiv \mathrm { CCH } _ { 3 } > \mathrm { CH } _ { 2 } - \mathrm { C } \equiv \mathrm { CH } > \mathrm { CH } \equiv \mathrm { CH }

D

CH≡CH>CH3≡CCH3>CH3C≡CH\mathrm { CH } \equiv \mathrm { CH } > \mathrm { CH } _ { 3 } \equiv \mathrm { CCH } _ { 3 } > \mathrm { CH } _ { 3 } \mathrm { C } \equiv \mathrm { CH }

Answer

CH≡CH>CH3−C≡CH>CH3C≡CCH3\mathrm { CH } \equiv \mathrm { CH } > \mathrm { CH } _ { 3 } - \mathrm { C } \equiv \mathrm { CH } > \mathrm { CH } _ { 3 } \mathrm { C } \equiv \mathrm { CCH } _ { 3 }

Explanation

Solution

The hydrogen atoms attached to triply bonded carbons are acidic and not all the hydrogen atoms of alkynes.