Which one of the following indicatprs works in the pH range $8 - 9.8$ ?

Litmus

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Phenolphthalein

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Methyl red

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Methyl orange

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Solution

The correct option is C Phenolphthalein
Phenolphthalein works in $p H$ range of $8.3 - 10.0$
Methyl Red works in $p H$ range of $4.4 - 6.5$
Methyl Orange works in $p H$ range of $3.2 - 4.5$

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Similar questions

What is the pH range at which our body works?

8 - 10

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