Question

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions respectively are [NCERT Exemplar]
(a) red and blue
(b) blue and red
(c) pink and colourless
(d) colourless and pink

Answer 1

Explanation:

The correct answer is option

(D)colourless and pink

HOPE IT HELPS...

PLEASE MARK IT AS BRAINLIEST......

PLEASEEEEE.......

Answer 2

The colours of phenolphthalein in acidic and basic solutions is colourless and pink respectively.

Explanation:

1. It is a man made synthetic indicator which is used to determine which solution is acidic and which is basic.

2. When phenolphthalein is added to a acidic solution, the soultion becomes or turns colourless indicating that it is acidic in nature.

3. And when phenolphthalein is added to a solution which is basic, then the solution turns into pinkish colour. By this way we can find out whether the solution is basic or not.

4. Therefore, the correct option is D.

Extra information:

• There is another indicator called litmus paper by which we can determine which is basic and which is acidic.

• The litmus paper if dipped in a solution turns to be red, then it indicates that the solution has acid.

• When the litmus paper dipped in a solution turns blue, then we can confirm that the solution has base in it.

KNOW MORE ABOUT INDICATORS:

Why does a moist blue Litmus Paper turns red when it is brought near the mouth of the test tube in which ferrous sulphate crystals are heated:

https://brainly.in/question/6355433

Importance of acids and bases:

https://brainly.in/question/4429448

#SPJ3