Which of the following exhibits different colors in acidic and basic solutions?

Buffer

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Indicator

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Arrhenius acid

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Arrhenius base

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Neutral condition

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Solution

The correct option is B Indicator
A $p H$ indicator is a halochromic chemical compound added in small amounts to a solution so that the $p H$ (acidity or basicity) of the solution can be determined visually. Hence, a $p H$ indicator is a chemical detector for hydronium ions $(H 3 O^{+})$ or hydrogen ions $(H^{+})$ in the Arrhenius model. Normally, the indicator causes the colour of the solution to change depending on the $p H$ .

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