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What is Photosynthesis ?

By Sachin Joshi
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INDICATORS AND ITS TYPES

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By Sachin Joshi

 Indicators:-

• These are the substances which predict the solution acid or base by change its colour or odour .

Types:-

•Indicators are of two types:-

1) Natural indicators.

2) Synthetic indicators.

3) Olfactory indicators.


1) Natural indicators :-

• These are indicators which are obtain from nature and predict the nature of solution.

Example:- Litmus paper( it changes its colour in acidic and in basic solution), extract of hebiscus flower, red cabbage etc.



2) Synthetic indicators:-

• These are the substances which are synthesised in lab or man mad indicators which predict the nature of solution by change in colour .

Example :- phenolphthalein ( in acidic it's colourless and in basic its colour change to pink),

Methylorange ( in acidic it's red and in basic its yellow)





3) Olfactory indicators:-

These are the inductors which change its odour in acidic and in basic medium.

Example:- Clove oil, Onion extract, vanilla etc.



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