📊 Science
Q. In a barometer, mercury is preferred over water because
  • (A) Mercury is good conductor of heat
  • (B) Mercury shines and therefore its level can be read easily
  • (C) Mercury has high density and low vapour pressure
  • (D) Mercury is available in pure form
✅ Correct Answer: (C) Mercury has high density and low vapour pressure

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Vikash Gupta
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