Question

In case of noble gases the general trend in the melting points and boiling points, down the group, is

• A. Decreases from He to Ar and then increases from Ar to Rn.
• B. Increases from He to Rn
• C. Increases from He to Ar and decreases from Ar to Rn
• D. Decreases from He to Rn

Answer 1

The correct option is B

Increases from He to Rn

Melting point and boiling points show regular increase from top to bottom in the group, with rise in atomic numbers.This increase is due to the greater inter atomic attractive forces(van der Waals forces) between atoms as with the increase in atomic number their atomic sizes increase.