Which of the following is not a buffer, Ask an Expert

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Which of the following is not a buffer solution?

a weak acid (to neutralize a strong base) and its conjugate base (to neutralize a strong acid)
a weak base (to neutralize a strong acid) and its conjugate acid (to neutralize a strong base)
a strong acid (to neutralize a strong base) and its conjugate base (to neutralize a strong acid)
formic acid and sodium formate

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Category:- Chemistry
Reference No.:- M9454447

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