Question

Mercury is used in thermometer because:
(a) it does not wet the glass
(b) it is a liquid
(c) it expands on heating
(d) all of these

Answer 1

Answer:

D. all of these

more importantly it expands on heating.

Answer 2

Answer:

(c) it expands on heating

Explanation:

We use Mercury in the thermometer to measure the temperature of any body or substance. As the Mercury is very sensitive to temperature, as soon as it detects any change in temperature its start expanding with the rise in temperature and comes below withe the decrease in temperature. That's why mercury is used in a glass tube for the measurements of the temperature and that device is called thermometer.