The pH range for phenolphthalein is

Phenolphthalein is a:

At 25^(@)C, pH range of phenolphthalein is 8-10 . At 100^(@)C , pH range of phenolphthalein would be

At 25^(@)C pH range of phenolphthalein is 8-10 . At 100^(@)C pH range of phenophthalein would be

What is the pH range in which phenolphthalein is colourless ?

The colour of phenolphthalein in acid is-

A solution turned pink when a drop of phenolphthalein was added to it. Then The probable pH of that solution 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) .

(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) .

(A ) : When Na_(2)CO_(3) is titrated against HCl in presence of phenolphthalein indicator, it is converted into NaCl. (R ) : Phenolphthalein indicator shows colour change in the P^(H) range of 3.5 to 4.6