WBJEE 2019 Chemistry Solved Paper

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Question : 15 of 40

Marks: +1, -0

Which of the following mixtures will have the lowest pH at 298 K ?

10 ml 0.05N CH3COOH + 5 ml 0.1 N NH4OH
5 ml 0.2 NH4Cl + 5 ml 0.2 N NH4OH
5 ml 0.1N CH3COOH + 10 ml 0.05 N CH3COONa
5 ml 0.1N CH3COOH + 5 ml 0.1 N NaOH

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