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Match List I with List II.
| List I | List II |
| P. Chlorophyll a | 1. Yellow-green |
| Q. Chlorophyll b | 2. Yellow |
| R. Xanthophylls | 3. Blue-green |
| S. Carotenoids | 4. Yellow to yellow-orange |
Your answer:
Correct answer: (d)
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Explanation
Why (d) is correct
In NCERT's paper chromatography of leaf pigments, chlorophyll a is bright or blue-green, chlorophyll b is yellow-green, xanthophylls are yellow and carotenoids are yellow to yellow-orange. So P-3, Q-1, R-2, S-4.
Why the other options are wrong
- (a) · your answer Chlorophyll b is yellow-green (1), not yellow to yellow-orange, and carotenoids are not yellow-green.
- (b) · your answer Chlorophyll a is blue-green (3), not yellow-green; that colour belongs to chlorophyll b.
- (c) · your answer This gives chlorophyll a the colour of chlorophyll b and mixes up xanthophylls and carotenoids.
NCERT point: Chlorophyll a is the chief pigment; chlorophyll b, xanthophylls and carotenoids are accessory pigments that widen the range of light used.
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