Question

Pumice stone is gas in solid type colloid in which dispersion phase is gas and dispersion medium is solid.
If true enter 1 else enter 0

Answer 1

Pumice stone is gas in solid type colloid in which dispersion phase is gas and dispersion medium is solid.

Pumice is created when super-heated, highly pressurized rock is violently ejected from a volcano. The unusual foamy configuration of pumice happens because of simultaneous rapid cooling and rapid depressurization. The depressurization creates bubbles by lowering the solubility of gases (including water and carbon dioxide) that are dissolved in the lava, causing the gases to rapidly exsolve (like the bubbles of carbon dioxide that appear when a carbonated drink is opened). The simultaneous cooling and depressurization freezes the bubbles in the matrix.