Normal mercury thermometer can be used to measure a temperature of about 300 C. However, its maximum temperature measurement range can be increased upto about 500 C by

increasing the diameter of the tube.

filling nitrogen under pressure in the stem.

using steel tube in place of glass tube.

accounting for the tube expansion.

Normal mercury thermometer can be used to measure a temperature of abo

1.	Normal mercury thermometer can be used to measure a temperature of about 300 C. However, its maximum temperature measurement range can be increased upto about 500 C by
A.	filling nitrogen under pressure in the stem.
B.	increasing the diameter of the tube.
C.	using steel tube in place of glass tube.
D.	accounting for the tube expansion.
Answer» B. increasing the diameter of the tube.