Question

will it be alright if water or oil is used in the thermometer?

Answer 1

It won’t be alright if we use oil or water in a thermometer as these liquids will stick to the capillary tube of the thermometer and won’t give right measure.

Mercury has got the high coefficient of expansion than most metals and also with oil and water. One more specific reason is that water has a higher freezing point and lower boiling point than mercury.

The fact that density of water is higher in liquid phase than solid phase also hinders the use of water.