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Question

In aqueous solution, the following mixture acts as buffer :
  1. HNO3+KNO3
  2. H2SO4+K2SO4
  3. NH4OH+NH4Cl
  4. CH3COOH+NaCl

A
H2SO4+K2SO4
B
HNO3+KNO3
C
NH4OH+NH4Cl
D
CH3COOH+NaCl
Solution
Verified by Toppr

For buffer solution
Weak acid + Its salt of strong base
OR Weak base + Its salt of strong acid.
In Option C
NH4OH weak base
NH4Cl weak base and strong acid salt
Thus option C is right. While no other option follow definition of buffer solution.

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