Which mixture forms a buffer when dissolved in 1 L of water?

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0.2 mol NaOH + 0.2 mol HBr

0.2 mol NaCl + 0.2 mol HCl

0.4 mol HNO2 + 0.2 mol NaOH

0.5 mol NH3+ 0.5 mol HCl

answer is C.

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Detailed Solution

Following reaction will occurThe resultant solution contains a weak acid & its salt and we have an acidic buffer.

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