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Question 51Asked in RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)

Which substance has a molecular mass of 44 u?

  1. ACarbon monoxide
  2. BCarbon dioxide
  3. CMethane
  4. DAmmonia
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Correct answer: (B) Carbon dioxide

From RRB JE CBT-1 PYQ 19 Feb 2026, Shift 2 (12:45 PM)

This is question 51 of RRB JE CBT-1 PYQ 19 Feb 2026, Shift 2 (12:45 PM). 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.