1.

Which of the following mixtures can be regarded as buffer ?

Answer»

500 ml 0.2( M) `CH_(3)COOH +` 1000 ml 0.02 ( M ) NaOH
500 ml 0.2( M) `CH_(3)COOH +` 300 ml 0.02 ( M ) NaOH
500 ml 0.2( M) `CH_(3)COOH +` 500 ml 0.02 ( M ) NaOH
500 ml 0.2( M) `CH_(3)COOH +` 500 ml 0.02 ( M ) `NH_(4)OH`

Answer :B,D


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