Physics
WAEC 2015
Water is unsuitable for use as a thermometric liquid because it
-
A.
expands unevenly between 0oC and 40oC
-
B.
has narrow temperature range
-
C.
has a concave meniscus
-
D.
maintains a fixed density
Correct Answer: Option B
Explanation
Water's freezing point is 0°C and its boiling point is 100°C at standard atmospheric pressure, which provides a limited temperature range for measurement compared to other liquids used in thermometers. Other liquids like mercury can measure a wider range of temperatures.
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