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Examples of Acids,Bases

Phenolphthale...

Question

Phenolphthalein is not a suitable indicator for:

A

N a O H - H C l

titration

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B

N a_{2} C O_{3} - H C l

titration

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C

N a O H - H_{2} S O_{4}

titration

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D

K O h - H N O_{3}

titration

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Solution

The correct option is A $N a O H - H C l$ titration
Phenolphthalein is a basic indicator which can identify the differences only in the basic pH range.
As shows no colour for an acidic and neutral range of pH

$N a O H + H C l ⟹ p H - 7$ .
So Phenolphthalein can’t be used here.

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