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Borax

Which of the ...

Question

Which of the following mixture will act as buffer?

A

H_{2} C O_{3} + N a O H (3 : 2 m o l e r a t i o)

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B

H_{2} C O_{3} + N a O H (3 : 4 m o l e r a t i o)

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C

N H_{4} O H + H C l (5 : 4 m o l e r a t i o)

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D

N H_{4} O H + H C l (4 : 5 m o l e r a t i o)

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Solution

The correct options are
A $H_{2} C O_{3} + N a O H (3 : 2 m o l e r a t i o)$
B $N H_{4} O H + H C l (5 : 4 m o l e r a t i o)$
The buffer solution is either solution of weak acid and its salt with strong base or solution of weak base and its salt with strong acid. Thus, the solution in option A and option B form acidic and basic buffer solution respectively.

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