Q.

Phenolphthalein cannot be used in the titration of

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a

HCI with NaOH

b

CH3COOH with NaOH

c

HCI with NH4OH

d

CH3COOH with NH4OH

answer is C.

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Detailed Solution

Since the base is weak it can’t react with phenolphthalein and form the colored form, which is mandatory for end point.
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