Methyl Orange and Phenolphthalein Indicators


 
 
Concept Explanation
 

Methyl Orange and Phenolphthalein Indicators

Phenolphthalein:

It is a colourless compound. An alcoholic solution of phenolphthalein is used as an indicator. It is colourless in an acidic solution, but becomes pink (red) in basic solution. It is used as indicator in different acid-base  iterations where its colour get changed due presence of base.

Methyl Orange:

A very small amount of solid methyl orange is dissolved in hot water and filtered. The filtrate is used as an indicator.

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Sample Questions
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Question : 1

Addition of methyl orange to sodium bicarbonate produces _________________ colour.

Right Option : C
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Question : 2

If tomato juice is added in a beaker containing Methyl Orange indicator , it will show ___________

Right Option : B
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Question : 3

If few drops of phenolphthalein indicator are added to lemon juice, then it will show _____________

Right Option : C
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