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NEET 2023 Phase 2 · BiologyPrevious Year Question

Match List I with List II and choose the correct answer:
List IList II
A. Chlorophyll aI. Yellow to yellow orange
B. Chlorophyll bII. Yellow green
C. XanthophyllIII. Blue green
D. CarotenoidIV. Yellow
Choose the correct answer from the options given below:

Answer: (C) (A)-(III), (B)-(II), (C)-(IV), (D)-(I). Paper chromatography of leaf pigments separates four pigments with characteristic colours: chlorophyll a is blue green, chlorophyll b is yellow green, xanthophylls are yellow, and carotenoids are yellow to yellow-orange.

  1. A.(A)-(II), (B)-(III), (C)-(I), (D)-(IV)
  2. B.(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
  3. C.(A)-(III), (B)-(II), (C)-(IV), (D)-(I)✓
  4. D.(A)-(III), (B)-(I), (C)-(IV), (D)-(II)

Correct Answer

(C) (A)-(III), (B)-(II), (C)-(IV), (D)-(I)

Solution & Explanation

Paper chromatography of leaf pigments separates four pigments with characteristic colours: chlorophyll a is blue green, chlorophyll b is yellow green, xanthophylls are yellow, and carotenoids are yellow to yellow-orange. So A-III (blue green), B-II (yellow green), C-IV (yellow), D-I (yellow to yellow orange), which is combination (3) = option C. NCERT: Class 11 Ch 11, p.137 [137:018-021]: "Chlorophyll a (bright or blue green in the chromatogram), chlorophyll b (yellow green), xanthophylls (yellow) and carotenoids (yellow to yellow-orange)"

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