Question

What are indicators ?Name any three indicators and state the colour change which takes place in
(i)acids
(ii) bases

Answer 1

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The substances which gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration ...

★some example of indicators

★ The substance called methyl yellow, which imparts a yellow colour to an alkaline solution

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★There are three types of economic indicators: leading, lagging and coincident.

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★Acids- Acids turn blue litmus to red

★ Bases-Bases turn red litmus to blue

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Answer 2

Answer:

Indicators are the substance which is used to test whether a substance is acidic or basic.

Eg:Litmus,Turmeric,China rose petals are natural indicators which state the colour change in acid and base.

Eg: phenolphthalein,Methyl orange are some some artificial indicators which state the colour change in acid and base.

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