Distinction between a weak acid or strong acid can be made through:

litmus indicator

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universal indicator

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methyl orange indicator

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Phenolphthalein indicators

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Solution

The correct option is B universal indicator
Weak acid and strong acid can be distinguished as weak acid and have a high $p H$ value whereas strong acid has a less value of $p H$ .
(Definition- An universal indicator is a blend of $p H$ indicator solutions made to identify the $p H$ of the solutions over a wide range of values).

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Similar questions

Name the indicator which can give us an idea of how strong or weak an acid or base is.

3

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The indicators which turn red in acid solution are :

(a) turmeric and litmus

(b) phenolphthalein and methyl orange

(d) phenolphthalein and litmus

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