Which of the following may be used as an anti-transpirant in plant?

Phenyl mercuric acetate

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Cobalt chloride

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Mercury

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Potassium

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Solution

The correct option is A Phenyl mercuric acetate
Phenyl mercuric acetate is an important antitranspirant and reduces transpiration in plants. Cobalt chloride is a chemical used to test transpiration in plants, because colour of cobalt chloride is different in hydrated and unhydrated forms. Mercury and potassium are not related to question.

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