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(A) In general phenolphthalein is used a...

(A) In general phenolphthalein is used as an indicator for the titration of weak acid `(CH_(3)COOH)` and strong base (NaOH).
(R) At equivalence point solution is basic.

A

Both (R) and (A) are true and reason is the correct explanation of assertion.

B

Both (R) and (A) are true but reason is not correct explanation of assertion

C

Assertion (A) is true but reason (R) is false

D

Assertion (A) is false but reason (R) is true

Text Solution

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The correct Answer is:
B
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The best indicator for detection of end point in titration of a weak acid and a strong base is

(a). IF both (A) and (R) are correct and (R) is the correct explanation of (A). (b). If both (A) and (R) are correct but (R) is not the correct explanation of (A). (c). If (A) is correct, but (R) is incorrect. (d). If (A) is incorrect, but (R) is correct. ltbr. (e) if both (A) and (R) are incorrect. Q. Assertion (A): In the titration of strong acid and strong base, phenolphthalein is used as suitable indocator. Reason (R): IN the titration of strong acid and strong base, the equivalence points lies is the pH range of (3.0-10.5) and phenolphthalein have pH range of (8.0-9.8) .

The solution of a weak acid and a strong base is alkaline.

At half - equivalence point in the titration of weak acid by a strong base , pH = …………..

The best indicator for the detection of the end point in the titration of a weak acid and a strong base is

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