n aqueous solution ‘A’ turns phenolphthalein solution pink. On addition of an aqueous solution ‘B’ to ‘A’, the pink colour disappears. The following statement is true for solu

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Q.
An aqueous solution ‘A’ turns phenolphthalein solution pink. On addition of an aqueous solution ‘B’ to ‘A’, the pink colour disappears. The following statement is true for solution ‘A’ and ‘B’

1 A is strongly basic and B is a weak base

2 A is strongly acidic and B is a weak acid.

3 A has pH greater than 7 and B has pH less than 7

4 A has pH less than 7 and B has pH greater than 7

Ans.
(3)

Phenolphthalein solution turns pink in basic solutions. Hence, solution A lies in the pH range of above 7. On adding solution B, the pink colour disappears, hence it has a pH less than 7.

Solution

Q.
An aqueous solution ‘A’ turns phenolphthalein solution pink. On addition of an aqueous solution ‘B’ to ‘A’, the pink colour disappears. The following statement is true for solution ‘A’ and ‘B’

1 A is strongly basic and B is a weak base

2 A is strongly acidic and B is a weak acid.

3 A has pH greater than 7 and B has pH less than 7

4 A has pH less than 7 and B has pH greater than 7

Ans.
(3)

Phenolphthalein solution turns pink in basic solutions. Hence, solution A lies in the pH range of above 7. On adding solution B, the pink colour disappears, hence it has a pH less than 7.

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Solution

Q. An aqueous solution ‘A’ turns phenolphthalein solution pink. On addition of an aqueous solution ‘B’ to ‘A’, the pink colour disappears. The following statement is true for solution ‘A’ and ‘B’

1 A is strongly basic and B is a weak base

2 A is strongly acidic and B is a weak acid.

3 A has pH greater than 7 and B has pH less than 7

4 A has pH less than 7 and B has pH greater than 7

Ans. (3) Phenolphthalein solution turns pink in basic solutions. Hence, solution A lies in the pH range of above 7. On adding solution B, the pink colour disappears, hence it has a pH less than 7.

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Q.
An aqueous solution ‘A’ turns phenolphthalein solution pink. On addition of an aqueous solution ‘B’ to ‘A’, the pink colour disappears. The following statement is true for solution ‘A’ and ‘B’

Ans.
(3)

Phenolphthalein solution turns pink in basic solutions. Hence, solution A lies in the pH range of above 7. On adding solution B, the pink colour disappears, hence it has a pH less than 7.