The least count of Beckmann.s thermometer is ____________ .

Describe about Beckmann thermometer.

What is ice point in a thermometer?

What is the steam point in a thermometer?

A vernier calliper has 20 divisions on the vernier scale, which coincide with 19 on the main scale. The least count of the instrument is 0.1 mm. The main scale divisions are of :

The least non - metallic halogen is :

Mercury is used in thermometers as it is

The least stable carbonium ion is