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Science · 2023 · 2 marks
CBSE 2023 · Region 5 · Set 1 · Q23
(a) List the events in proper sequence that take place during the process of photosynthesis.
(a)
List the events in proper sequence that take place during the process of photosynthesis.
OR
(b)
Explain in brief two ways by which leaves of a plant help in excretion.
Marking-scheme solution
(a) (i) Absorption of light energy by chlorophyll.
(ii) Conversion of light energy to chemical energy and splitting of water molecules into hydrogen and oxygen.
(iii) Reduction of carbon dioxide to carbohydrates. OR
(b) (i) Excess water is excreted by transpiration.
(ii) Oxygen as waste product of photosynthesis is excreted through stomata.
(iii) Shedding of leaves.
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CBSE Class 10 Science past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.