Hydrogen and oxygen are gases but water is liquid. What is the difference between gas and liquid?

What is the difference between gas and vapour?

What is the difference between real gas and ideal gas?

What are the difference between vapour and gas?

What is the difference between lime water and milk of lime?

Why water is liquid at ordinary temperature?

C_(p) - C_(v) = a for hydrogen gas and C_(p) - C_(v) = b for oxygen gas. What is the relation between a and b?

What is real and apparent expansion of liquid?

Water remains liquid between

Hydrogen and oxygen gases are kept in two vessels at the same temperature and pressure. What is the ratio of the rms speed of their molecules?