Question

What is observed when a mixture of common salt and ammonium chloride is heated?
A.Solid common salt gets deposited on the cooler parts of the funnel,while solid ammonium chloride remains in the china dish
B.Mixture of common salt and ammonium chloride turns into greenish crystals when allowed to cool
C.Ammonium chloride is deposited on the cooler parts of the funnel and solid common salt remains in the china dish
D.Droplets containing both common salt and ammonium chloride appear on the upper part of the funnel,while some molten mixture of common salt and ammonium chloride remains in the china dish.

Answer 1

This process is followed by only ammonium chloride but not the common salt so this becomes the major difference between the two and helps us to easily distinguish between them.

Complete step by step answer:
As we know that common salt is obtained from sea and it is the natural form of the salt and it is nothing but the sodium chloride. Also, this salt is used in various activities. further we will discuss the composition or the formation of ammonium chloride so we come to know that ammonium chloride is formed as a byproduct in the ammonia soda process for making sodium carbonate. Here we need to discuss what happens when the common salt and ammonium chloride is mixed together and is heated.

For this process we need to know that there is a process which is known as sublimation process which further states that the matter in solid state directly gets converted to the gaseous state without forming the liquid. We have discussed this because ammonium chloride gets sublimated on heating. This process is followed by only ammonium chloride but not the common salt so this becomes the major difference between the two and helps us to easily distinguish between them. when the two salts are mixed together and then heated we notice that the ammonium chloride sublimation takes place on getting heated as the vapours rise up the funnel and then gets deposited in the cooler parts of the funnel and as we have discussed sodium chloride does not get sublimated so it remains in the china dish.

Hence, option C is correct.

Note:
Sodium chloride is used in day to day life as it adds taste to our food and also used in various activities.There is one more method through which the ammonium chloride gets formed and it is produced by the reaction ammonium sulphate and sodium chloride Solutions.