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Question 47Asked in RRB JE CBT-1, 20 Feb 2026, Shift 1 (9:00 AM)

Why is potassium hydroxide used in the bell-jar experiment involving photosynthesis?

  1. ATo absorb carbon dioxide
  2. BTo provide sunlight
  3. CTo supply oxygen
  4. DTo remove water
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Correct answer: (A) To absorb carbon dioxide

From RRB JE CBT-1 PYQ 20 Feb 2026, Shift 1 (9:00 AM)

This is question 47 of RRB JE CBT-1 PYQ 20 Feb 2026, Shift 1 (9:00 AM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.