Hydrocarbons - Result Question 48
####50. Which one is the correct order of acidity? [2017]
(a) $CH \equiv CH>CH_3-C \equiv CH>CH_2$ $=CH_2>CH_3-CH_3$
(b) $CH \equiv CH>CH_2=CH_2>CH_3-C \equiv CH>$ $CH_3-CH_3$
(c) $CH_3-CH_3>CH_2=CH_2>CH_3-C \equiv CH>$ $CH \equiv CH$
(d) $CH_2=CH_2>CH_3-CH=CH_2>CH_3-C \equiv$ $CH>CH \equiv CH$
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Solution:
- (a) Correct order is
$ \begin{aligned} & H-C \equiv C-H>H_3 C-C \equiv C-H>H_2 C \\ &(\begin{matrix} \text{ Two acidic } \\ \text{ hydrogens } \end{matrix} ) \quad(\begin{matrix} \text{ One acidic } \\ \text{ hydrogen } \end{matrix} ) \\ &= CH_2>CH_3-CH_3 \end{aligned} $
