Substances that are used to determine whether a particular substance is an acid or a base are called __________ .

reagent

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catalyst

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salt

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indicator

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Solution

The correct option is D
indicator

Indicators are the special type of substances which are used to identify acids, bases and neutral solutions by showing colour changes. We use an indicator because we cannot check nature of every substance by tasting it. Few examples of indicators are litmus, turmeric, China rose extract, phenolphthalein, methyl orange etc.

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Similar questions

How do we test whether a substance is an acid or base? Give example of some substances that can be used for testing acids and bases. [3 MARKS]

Acid-base Indicators are substances which show whether the substance is basic or acidic.

(H S^{-})

(H C O_{3}^{-})

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