Question

Give reason when anhydrous calcium chloride turns into a colourless solution when it exposed in air

Answer 1

The calcium chloride is a deliquescent substance.

If anhydrous calcium chloride is exposed in the air  what it will generally happen is that it will absorb water from the atmosphere.

Then after few minutes it will be observed that  there will be pool of liquid which is remained back  instead of a lump which is basically white in color.

Answer 2

As calcium carbide is a deliquescent substance it absorb water from the atmosphere when exposed to air. If anhydrous calcium chloride is exposed in the air it will also water from the atmosphere and turns into a colourless solution.