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Question: Answered & Verified by Expert
Carbon dioxide is necessary for photosynthesis. The chemical used to remove this gas most effectively from entering a control apparatus is
BiologyPhotosynthesis in Higher PlantsAIIMSAIIMS 2015
Options:
  • A calcium oxide
  • B distilled water
  • C potassium hydroxide solution
  • D sodium carbonate.
Solution:
1058 Upvotes Verified Answer
The correct answer is: potassium hydroxide solution
Like other alkali metals, potassium hydroxide combines with $\mathrm{CO}_2$ as such :-
$$
2 \mathrm{KOH}+\mathrm{CO}_2 \rightarrow \mathrm{K}_2 \mathrm{CO}_3+\mathrm{H}_2 \mathrm{O}
$$

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