A) \[RCOOH>HOH>ROH>HC\equiv CH\]
B) \[RCOOH>HOH>CH\equiv CH>ROH\]
C) \[RCOOH>HC\equiv CH>HOH>ROH\]
D) \[RCOOH>ROH>HOH>CH\equiv CH\]
Correct Answer: A
Solution :
Acid dissociation constant value for acetic acid, water, ethanol and ethyne are 4.86, 15.4, 16.01 and 24.95 respectively As we know that\[p{{K}_{a}}\]is inversely proportional to acidic-strength so, larger the\[p{{K}_{a}}\]value, lower is acidic strength. Therefore, the correct order is \[RCOOH>HOH>ROH>HC\equiv CH\]
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