Question

Clinical thermometers are made of glass. Identify the characteristic(s) considered for the selection.
(i) It is a bad conductor of heat
(ii) It is transparent
(iii) It is strong

• A. Only (i) and (ii)
• B. Only (ii) and (iii)
• C. Only (i) and (iii)
• D. (i), (ii) and (iii)

Answer 1

The correct option is A Only (i) and (ii)

Glass is a poor conductor of heat and doesn't expand easily. As a result, when the thermometer undergoes a large temperature change it will have minimal change in dimensions. Hence, we will get an accurate reading of the temperature. Moreover, the transparency property of glass helps us to see the reading of the temperature.