Question

Which of the following substance is hygroscopic? A cryolite B feldspar C anhydrous calcium chloride D slag

Answer 1

A cryolite substance is hygroscopic.

Cryolite was depleted by 1987.

In 10120C which means 1285K a pure cryolite melt by itself.

It consists of aluminum oxides. In the process of electrolysis, aluminum has extracted easily.

Cryolite looks colorless. But it has a color white-reddish to gray-black.

Cryolite is hygroscopic in the given choices.