Question

Qn. 4.Write two names
1. Indicators​

Answer 1

1.Turmeric

2.China rose

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Answer 2

• Thymol blue Yellow 8.0 - 9.6
• Phenolphthalein Colorless 8.2 - 10.0
• Thymolphthalein Colorless 9.4 - 10.6
• Alizarin yellow R Yellow 10.1 - 12.0

$\huge\boxed{Did \: You \: Know}$

Indicators are substances that change colour when they are added to acidic or alkaline solutions. Litmus, phenolphthalein, and methyl orange are all indicators that are commonly used in the laboratory.