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Question 89Asked in RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)

Equal pieces of zinc and copper are added separately to dilute sulphuric acid. Which

Equal pieces of zinc and copper are added separately to dilute sulphuric acid. Which observation is CORRECT?
  1. ABoth metals evolve hydrogen gas
  2. BNeither metal evolves hydrogen gas
  3. COnly zinc evolves hydrogen gas
  4. DOnly copper evolves hydrogen gas
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Correct answer: (C) Only zinc evolves hydrogen gas

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

This is question 89 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.