Question:
Chlorophyll-a is ___________ in colour.
Chlorophyll-a is ___________ in colour.
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Chlorophyll-a = blue-green;\; Chlorophyll-b = yellow-green.
Updated On: Feb 9, 2026
- Yellow
- Blue green
- Orange
- Yellow green
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The Correct Option is B
Solution and Explanation
Step 1: Understanding chlorophyll pigments.
Chlorophyll pigments are responsible for absorption of light energy during photosynthesis and occur in different forms such as chlorophyll-a and chlorophyll-b.
Step 2: Colour of chlorophyll-a.
Chlorophyll-a absorbs light mainly in the blue-violet and red regions and reflects blue-green light, giving it a blue-green colour.
Step 3: Analysis of options.
(A) Yellow: Incorrect — associated with carotenoids.
(B) Blue green: Correct — characteristic colour of chlorophyll-a.
(C) Orange: Incorrect — carotene pigments.
(D) Yellow green: Incorrect — this describes chlorophyll-b.
Step 4: Conclusion.
Chlorophyll-a is blue green in colour.
Chlorophyll pigments are responsible for absorption of light energy during photosynthesis and occur in different forms such as chlorophyll-a and chlorophyll-b.
Step 2: Colour of chlorophyll-a.
Chlorophyll-a absorbs light mainly in the blue-violet and red regions and reflects blue-green light, giving it a blue-green colour.
Step 3: Analysis of options.
(A) Yellow: Incorrect — associated with carotenoids.
(B) Blue green: Correct — characteristic colour of chlorophyll-a.
(C) Orange: Incorrect — carotene pigments.
(D) Yellow green: Incorrect — this describes chlorophyll-b.
Step 4: Conclusion.
Chlorophyll-a is blue green in colour.
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