Question

What is indicator? Give two examples.

Answer 1

Hola!!!

INDICATORS
===========

An indicator is a substance that changes its colour in acidic and basic medium.An indicator shows one colour in acidic medium and different colour in basic medium so that they are called indicators.
eg:-Litmus , turmeric

_______________________________

There are 3 types of indicators》》

● Natural lndicators
________________

lndicators derived from natural sources are called natural indicators.
eg:- Litmus , red cabbage , turmeric , china rose petals etc..

● Synthetic indicators
_________________

lndicators prepared in laboratary are callwd synthetic indicators.
eg:- Phenophtaline , methyl orange etc..

● Olfactory indicators
_________________

lndicators which give different odours in acidic and basic medium.
eg:-Onion , vanila essence etc...

HOPE IT DOES AID YOU!!

======================================

Answer 2

Indicator is a substance by which we can detect the acidic or basic nature of a solution.

Explanation:

1. Indicator is that chemical compound or that substance which has the ability to change colour in acid or base and this property can be used to detect whether the solution is acidic or basic.

2. These compounds are generally derived form the pigments of plants or may be derived artificially.

3. Two examples of indicators includes litmus paper and phenolphthalein.

• When litmus paper is dipped in solution which is acidic, it turns into red color.

• Similarly, litmus paper changes its color into blue when dipped in solution which is basic.

• Phenolphthalein when added in solution which is acidic, the solution becomes colourless.

• And when after adding phenolphthalein the solution turns into pink, then it is confirmed that the solution is basic.

4. This way we can use indicators to detect basic and acidic solution.

LEARN MORE:

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions respectively:

https://brainly.in/question/16690523

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

https://brainly.in/question/6355433

#SPJ3