Name metal. that exist in liquid state
and why acids should not me stored in metal containers

Very pure gallium is a silvery blue metal that fractures conchoidally like glass. Gallium liquid expands by 3.10% when it solidifies; therefore, it should not be stored in glass or metal containers because the container may rupture when the gallium changes state.

When liquid (at m.p.): 6.095 g/cm3

Oxidation states: −5, −4, −3, −2, −1, +1, +2, +3 (an amphoteric oxide)

Ionization energies: 1st: 578.8 kJ/mol; 2nd: 1979.3 kJ/mol; 3rd: 2963 kJ/mol; (more)

Appearance: silvery blue

1. Mercury is the metal that exists in liquid state.

2. Acids should not be stored in metal containers because most of the time acid reacts with almost every metal and produces salts or oxides.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.