Verified Solution • 2025–26 Session moderate

QAIPMT-2003-Ch-2677: NEET 2003 Chemistry - Class 11 AIPMT-2003-Ch-2677 Solution: Which one of the following orders of acid strength is correct?

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

Multiple Choice Options

A $RCOOH>ROH>HOH>HC\equiv CH$
B $RCOOH>HOH>ROH>HC\equiv CH$
C $RCOOH>HOH>HC\equiv CH>ROH$
D $RCOOH>HC\equiv CH>HOH>ROH$

Step-by-Step Verified Solution

Carboxylic acid is much stronger than water and alcohol. Since the carboxylate ion after the removal of proton is stabilised by resonating structures as higher is the tendency to donate proton, stronger is the acid. The � OH in alcohols is almost neutral. Acetylene is also weakest acid. Thus the correct order is RCOOH > HOH > ROH > HC _ CH depending upon the rate of donation of proton.

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