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Question

Which of the following is incorrectly matched?
Indicator Colour change in basic medium
(1) Litmus paper Red to blue
(2) Methyl orange Orange to red
(3) Phenolphthalein Colourless to pink
(4) Turmeric Yellow to reddish brown

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Solution

Methyl orange is a synthetic indicator used to distinguish between acids and bases. It changes its colour to red in an acidic medium and yellow in a basic medium.

Hence, the correct answer is option (b).

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