MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibriumPrevious Year Questions

Which will make basic buffer? (NEET 2019)

A.100 mL of 0.1 M HCl + 100 mL of 0.1 M NaOH

B.50 mL of 0.1 M NaOH + 25 mL of 0.1 M

C.100 mL of 0.1 M CH3COOH + 100 mL of 0.1 M

D.100 mL of 0.1 M HCl + 200 mL of 0.1 M NH4OH✓ Correct

Explanation

Acid-base titration: 4 4 10mmol 20 mmol HCl NH OH NH Cl -> HCl is the limiting reagent. Solution contains NH4OH (weak base) and NH4Cl (salt of strong acid and weak base). Therefore, a basic buffer will be formed.

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