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Buffer Solutions

Question

Which can act as buffer?

$C H_{3} C O O H + H_{2} C O_{3}$
$N H_{4} C l + H C l$
40 ml of 0.1 M $N a C N$ +20 ml of 0.1 M $H C N$
$N a C l$ + $N a O H$

A

N H_{4} C l + H C l

B

C H_{3} C O O H + H_{2} C O_{3}

C

40 ml of 0.1 M

0.1 M N H_{3}

+20 ml of 0.1 M

H C N

D

N a C l

+

N a O H

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Solution

Verified by Toppr

Buffer solution is a mixture of weak acid and its salt of weak acid.

In Option C
$N a C N \to$ salt of strong base and weak acid

$H C N \to$ weak acid

$∴$ They can act as buffer.

While no other options follow definition of buffer solution.

Option C is correct.

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