Water is a liquid and abnormally has low volatility. Explain. 

Hot liquids flow faster than cold liquids. Explain.

Do all substances change from solid to liquid and liquid to gas on heating ? Explain.

Mercury is the least volatile liquid. Explain.

(A) Below 2.2 Kelvin, helium is called super fluid (R) Helium has abnormally low viscosity below 2.2 Kelvin

HF is a liquid while HCl is a gas - explain.

Water is a liquid at room temperature, but not hydrogen sulphide. Why?

Stannous chloride has high melting point (is a solid) while stannic chloride has low melting point (is a liquid). Why?

(A) HCl most volatile hydrogen halide (R ) HCl has lowest boiling point