Question

name two indicators which cannot be used to check for acidic substances.why?​

Answer 1

Answer:

Indicators which can be used to check for acidic substances are -:

Turmeric, China rose, Litmus these are natural indicators.

Phenolphthalein is a man- made indicator.

Answer 2

Explanation:

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$\large \mathtt \red{What \: are \: indicators?}$

Indicators are substances that are used to test whether a substance is acidic or basic ot neutral in nature. They change their color when added to a solution containing an acidic or a basic substance. Example: Turmeric gives brownish red color in basic medium and yellow in acidic medium.

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Natural:-

• Turmeric
• red cabbage
• beetroot juice
• Onion
• Litmus paper

Artificial:-

• Phenolphthalein
• Methyl Orange