MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibriumBuffer Solutions

Which of the following pairs constitutes a buffer?

A.HNO2 and NaNO2✓ Correct

B.NaOH and NaCl

C.HNO3 and NH4NO3

D.HCl and KCl

Explanation

A pair of HNO2 and NaNO2 constitutes a buffer, because HNO2 a weak acid and NaNO2 is a salt of weak acid (HNO2) with strong base (NaOH). Hence, it is an example of acids buffer solution.

Back to Question Bank

Practice More Like This

Take chapter-wise tests, track your progress, and master Ionic equilibrium.

Start Free Practice →