Question on: JAMB Physics - 2024
I. It wets glass
II. It needs to be coloured
III. It has a low density
Water is not suitable for use as a thermometric liquid because
A
I only
B
I and II only
C
I, II, and III only
D
II and III only
Ask EduPadi AI for a detailed answer
Correct Option: C
The question asks why water is unsuitable as a thermometric liquid. Let's analyze the statements:
- I. It wets glass: This is significant. If water wets the thermometer's glass, it clings to the sides, making temperature readings inaccurate due to meniscus changes.
- II. It needs to be coloured: Coloring water improves visibility but is not a fundamental reason for unsuitability. Other liquids can also be coloured.
- III. It has a low density: While true, it is not the primary reason. The main issue is wetting the glass.
Therefore, the most significant reason is that water wets glass.
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