Exams › JEE Main › Chemistry
Which of the following pairs constitutes a buffer?
- NaOH and NaCl
- HNO3 and NH4NO3
- HCl and KCl
- HNO2 and NaNO2
Correct answer: HNO3 and NH4NO3
Solution
A buffer solution consists of a weak acid and its conjugate base. HNO3 is a strong acid, and NH4NO3 is its salt, but it does not contain the conjugate base of HNO3.
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