Question

With the help of well labelled diagram explain how solid ammonium chloride converts directly to gaseous state on heating

Answer 1

Take a mixture of ammonium chloride and salt in a china dish cover it inverted conical transparent funnel. At the other end of the funnel put a cotton plug so that vapour could not come out. Now place china dish on a burner. As the ammonium chloride is sublime after heating it will directly converted into vapour and this vapour will again condense at the upper colder part of funnel to form solid ammonium chloride. In this way the mixture ammonium chloride and salt can be separated by the sublimation method.




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Answer 2

As we know that, ammonium chloride changes

directly from solid to gaseous state on heating. So,

in order to separate a mixture containing a volatile

component from a non-volatile impurity (salt in this

case), the sublimation process is used.

Take a mixture of ammonium chloride and salt. Crush

it and put it in a china dish.

Put an inverted funnel over the china dish. Put

a cotton plug on the stem of the funnel. Now heat

slowly. It is observed that ammonium chloride

sublimes i.e., gets converted directly into vapour and

gets condensed on the inner core of funnel