Which of the following changes occur when phenolphthalein is added in acidic and basic solutions respectively:

colourless and pink

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colourless and blue

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pink and colourless

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blue and colourless

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Solution

The correct option is A colourless and pink
Phenolphthalein turns colourless in acidic medium and pink in basic medium.

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Question 4

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are
(a) red and blue.
(b) blue and red.
(c) pink and colourless.
(d) colourless and pink

Q. In acidic solution, phenolphthalein gives a pink colour. The basic solution containing phenolphthalein is colourless.

Q. Two solutions A and B have pH values of 3.0 and 9.5 respectively. Which of these will turn litmus solution from blue to red and which will turn phenolphthalein from colourless to pink?

Q. Two salts

A

and

B

are dissolved in water separately. When phenolphthalein is added to the two solutions one solution turned pink and the other solution was colourless. Identify

A

and

B

Match the following:
$\begin{matrix} a) Litmus & 1) Blue in acidic, pink in basic soils b) Methyl orange & 2) Red in acidic, yellow in basic solutions c) Phenolphthalein & 3) Blue in basic, red in acidic solutions d) Color of Hydrangea & 4) Pink in basic, colorless in acidic solutions \end{matrix}$

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Which of the following changes occur when phenolphthalein is added in acidic and basic solutions respectively:

The correct option is A colourless and pinkPhenolphthalein turns colourless in acidic medium and pink in basic medium.

The correct option is A colourless and pink
Phenolphthalein turns colourless in acidic medium and pink in basic medium.