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Chlorophyll a shows maximum absorption in the

(a) ultraviolet region only Your answer
(b) orange and yellow regions Your answer
(c) green and yellow regions Your answer
(d) blue and red regions Correct

Your answer: Correct answer: (d)

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Explanation

Why (d) is correct

The absorption spectrum of chlorophyll a shows peaks in the blue and red regions of the spectrum.

Why the other options are wrong

(a) · your answer Chlorophyll a absorbs mainly visible light; ultraviolet is not its main absorption region.
(b) · your answer Orange and yellow light are only weakly absorbed.
(c) · your answer Green and yellow light are largely reflected.

NCERT point: Most photosynthesis takes place in the blue and red regions of the spectrum, where chlorophyll a absorbs most.

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