Question

What is an indicator? Name two common indicators.​

Answer 1

Indicator helps in differentiating between two or more substances by changing the colour or odour mainly used in finding if it is a acid or base.

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There are both Natural and Man-Made indicators.

Natural Indicators:-

Natural indicators are found in nature and can differentiate between a acid or base by changing colour or odour.

Eg:-Turmeric solution:-Turmeric turns red if the item is  a base and stays yellow in case of acid.

Red cabbage:-Red cabbage has a pigment called anthocyanins which changes red ,purple or blue according to the nature of the substance.

Man-Made indicators:-

There are many Man-Made indicators some of them are:-

Litmus paper:-Blue litmus turns red if it is acidic in nature and red litmus turns blue it it is basic in nature.

Phenolphthalein solution:-The Phenolphthalein turns colourless in acidic solution and pink in basic

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Answer 2

Answer:

Indicator helps in differentiating between two or more substances by changing the colour or odour mainly used in finding if it is a acid or base.

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There are both Natural and Man-Made indicators.

Natural Indicators:-

Natural indicators are found in nature and can differentiate between a acid or base by changing colour or odour.

Eg:-Turmeric solution:-Turmeric turns red if the item is  a base and stays yellow in case of acid.

Red cabbage:-Red cabbage has a pigment called anthocyanins which changes red ,purple or blue according to the nature of the substance.

Man-Made indicators:-

There are many Man-Made indicators some of them are:-

Litmus paper:-Blue litmus turns red if it is acidic in nature and red litmus turns blue it it is basic in nature.

Phenolphthalein solution:-The Phenolphthalein turns colourless in acidic solution and pink in basic

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