Assertion: In general, phenolphthalein is used as an indicator for the titration of weak acid (HA) against strong base (NaOH).
Reason: At equivalent point, solution is basic.

Both Assertion and Reason are correct and Reason is the correct explanation of Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion

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Assertion is correct but Reason is not correct

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Assertion is not correct but Reason is correct

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Both Assertion and Reason are not correct

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion
The phenolphthalein indicator changes color over pH range 8.0 to 9.8.
During titration of weak acid (HA) against strong base (NaOH), at equivalence point complete neutralization occurs and a salt NA of weak acid (HA) with strong base (NaOH) is obtained.
The hydrolysis of this salt gives alkaline solution in the pH range 8.0 to 9.8.
Hence, in general phenolphthalein is used as an indicator for the titration of weak acid (HA) against strong base (NaOH).

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Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
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Assertion: In general, phenolphthalein is used as an indicator for the titration of weak acid (HA) against strong base (NaOH).Reason: At equivalent point, solution is basic.

Assertion: In general, phenolphthalein is used as an indicator for the titration of weak acid (HA) against strong base (NaOH).
Reason: At equivalent point, solution is basic.