Q.

Which will make basic buffer?

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a

100 mL of 0.1MHCl+100 mL of 0.1MNaOH

b

50 mL of 0.1MNaOH+25 mL of 0.1MCH3COOH

c

100 mL of 0.1MCH3COOH+100 mL of 0.1MNaOH

d

100 mL of 0.1MHCl+200 mL of 0.1MNH4OH

answer is D.

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Detailed Solution

Acid-base titration :    HCl    +    NH4OH⟶NH4Cl 10 mmol       20 mmol∴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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