Question

Sublimation of ammonium chloride is a physical change.
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Answer 1

Answer:

Sublimation is the process of change of state from solid directly into vapour. As there is nochange in the composition of the compound just a change of state, sublimation process is a physical change. Ammonium chloride decomposes into ammonia and hydrochloric acid at its sublimation temperature.

Explanation:

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Answer 2

Explanation:

• Sublimation is the process of change of state from solid directly into vapour. 
• Ammonium chloride decomposes into ammonia and hydrochloric acid at its sublimation temperature.