Question

why do we use mercury in thermometer ?can water be used instead of mercury?what are the problems in using it?​

Answer 1

Answer:

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Answer 2

Answer:

• Based on the criteria of melting and boiling point mercury is having the temperature reading capacity compared to water.
• The color of mercury is silvery which is easy to identify and where as water is transparent and there is a chance of reflections of various colors.
• The mercury does not stick to capillary wall of thermometer and which can easily measure temperature accurately.
• We can measure the negative and positive temperature by using the mercury but water cannot. Water is not helpful to measure below 0°C and above 100°C.
• Water having the property of condensation but the mercury has no condensation property which is helpful to expect the exact values compared to water.

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