JEE Main 2002 Chemistry question

1 M NaCl and 1 M HCl are present in an aqueous solution. The solution is

(1)not a buffer solution with pH < 7Correct
(2)not a buffer solution with pH > 7
(3)a buffer solution with pH < 7
(4)a buffer solution with pH > 7

Answer: (1)

Solution

A buffer needs a weak acid with its salt (or a weak base with its salt). HCl is a strong acid and NaCl is the salt of a strong acid and strong base, so the mixture is

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Question ID VK-037929