Which one of the following orders of acidic strength is correct ?

Question

Which one of the following orders of acidic strength is correct ? (A) RCOOH > HOH > HC ≡ CH > ROH (B) RCOOH > HC ≡ CH > HOH >ROH (C) RCOOH >ROH > HOH > HC ≡ CH (D) RCOOH > HOH > ROH >HC ≡ CH

Tardigrade Admin · Accepted Answer

Carboxylic acid is stronger than alcohol and water because after removal of proton, carboxylate ion is stabilised by resonance. Hence, correct order of acid strength is

RCOO H > H O H > RO H > H C \equiv C H

Which is based upon the rate of donation of proton or strength of base, thus order of basic strength is

\overset{ˉ}{C} \equiv C H > R - \overset{ˉ}{O} > O H^{-} > RCO O^{-}

Q. Which one of the following orders of acidic strength is correct ?

RCOOH > HOH > HC $\equiv$ CH > ROH

RCOOH > HC $\equiv$ CH > HOH >ROH

RCOOH >ROH > HOH > HC $\equiv$ CH

RCOOH > HOH > ROH >HC $\equiv$ CH