What is the colour change for china rose when treated with lime juice?

Colour changes to magenta

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Colour changes to red

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Colour changes to green

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No colour changes

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Solution

The correct option is B Colour changes to magenta
China rose is a natural indicator which changes colour to determine the nature of an acid or a base. Lime juice is highly acidic with a $p H$ of 2.5. A solution of China rose turns green in a basic solution and bright pink or magenta in an acidic solution. Hence, when treated with lime juice it turns into magenta colour.

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