Question

Which sample of matter can be separated into different substances by physical means?
1. LiCl(s)
2, NH3(g)
3. NH3(l)
4. LiCl(aq)

Answer 1

(4) LiCl(aq)

LiCl(a) is a mixture of a compound and water. The LiCl can be separated from the water. All the other choices are compounds. Mixtures are easy to separate by physical means.

Answer 2

Answer:

Licl (aq) can be separated into different substances by physical means.

Explanation:

Physical method involves the process which does not alter chemical properties of the substances. Among given options, aqueous solution of lithium chloride can be separated by physical method. Ammonium chloride is a salt ,soluble in water. It can be separated from water by heating. Upon heating, water evaporates and solid lithium chloride is obtained.

Ammonia is a gas and it can not be separated into its constituents using any physical method.