The Use of Mercury in Atmospheric Pressure Measurement
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Questions and Answers

Why is mercury used in measuring atmospheric pressure?

  • It is easily available and cost-effective for making barometers
  • It has low density and doesn't evaporate, making it ideal for barometers
  • It has high density and doesn't stick to glass, making it suitable for barometers (correct)
  • It is a non-toxic and environmentally friendly option for barometers
  • What property of mercury makes it suitable for measuring atmospheric pressure?

  • It has low density, making it rise in the barometer tube with changes in atmospheric pressure
  • It is a non-reactive metal, ensuring accurate pressure readings
  • It is a good conductor of electricity, allowing accurate pressure measurements
  • It has a high boiling point, ensuring it remains in liquid form at room temperature (correct)
  • Why is mercury preferred over water in barometers for atmospheric pressure measurement?

  • Mercury's high density allows for a wider range of pressure measurement compared to water
  • Mercury is less affected by temperature changes compared to water (correct)
  • Water's low density causes inaccuracies in pressure measurement
  • Water evaporates quickly, making it unsuitable for long-term pressure measurement
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