Among the following compounds, the strongest acid is :

Options

A. `HC-=CH`
B. `C_(6)H_(6)`
C. `C_(2)H_(6)`
D. `CH_(3)OH`

Answer

D

Explanation

`C_(6)H_(6) and C_(2)H_(6)` being hydrocarbons are very weak acids. To decide whether `CH-=CH` or `CH_(3)OH` is a stronger acid, consier the reaction.
`HC-=C^(-)Na^(+)+underset(("stronger acid"))(CH_(3)OH) to underset(("weaker acid"))(HC-=CH)+CH_(3)O^(-)Na^(+)` Since a stronger acid displaces a weaker acid from its salts, therefore, `CH_(3)OH` is a stronger acid than `HC-=CH`.