Question

which compound turns into solid when kept open for some time?????

Answer 1

Explanation:

The solids which when kept in open , form a solution ( saturated solution ) after some time are called deliquescent substances. The property by the virtue of which a solid kept in open absorbs moisture from the atmosphere until it forms a saturated solution is called deliquescency. So, the example is FeCl3, MgCl, etc.

Answer 2

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deliquescent substances