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Question 35Asked in RRB JE CBT-1, 19 Feb 2026, Shift 3 (4:30 PM)

Why is mercury obtained from cinnabar ore through two heating steps instead of direct

Why is mercury obtained from cinnabar ore through two heating steps instead of direct reduction?
  1. AMercury sulphide must first change into oxide
  2. BMercury metal reacts with oxygen on heating
  3. CMercury oxide forms only in absence of air
  4. DMercury sulphide melts before decomposition
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Correct answer: (A) Mercury sulphide must first change into oxide

From RRB JE CBT-1 PYQ 19 Feb 2026, Shift 3 (4:30 PM)

This is question 35 of RRB JE CBT-1 PYQ 19 Feb 2026, Shift 3 (4:30 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.