A buffer solution of `pH =9` can be prepared by mixing
A. `CH_(3)COONa` and `CH_(3)COOHs`
B. NaCl and NaOH
C. `NH_(4)Cl` and `NH_(4)OH`
D. `KH_(2)PO_(4)` and `K_(2)HPO_(4)`

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1 Answers

Correct Answer - C
A basic buffer `(pH=9)` is formed by mixing a solution of a weak base and its salt with a strong acid. Therefore, correct choice is (C ) i.e., `NH_(4)OH` and `NH_(4)Cl`

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