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Assertion: Film forming chemical should not be used for checking transpiration.

Reason: Film forming chemicals interrupt transpiration, photosynthesis and respiration.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

1 Answer

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Best answer

The correct option is: (d)

Explanation:

Film forming chemicals check transpiration by forming a thin film on the transpiring surface. They are sufficiently permeable to carbon dioxide and oxygen to allow photosynthesis and respiration but prevent movement of water vapours through them. These such chemicals can be used as antitranspirants.

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