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Ammonium chloride is also a sublimable solid. Give a reason why sublimation of ammonium
chloride involves a physical & a chemical change.
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after there is no change in the composition of a compound just a change of state sublimation process is a physical change.. ammonium chloride decompose into ammonia and hydrochloric acid and it's sublimation temperature...
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Ammonium chloride - sublimes on heating & dissociates into ammonia [NH₃]
& hydrogen chloride [HC1], which recombine on cooling to give back - NH₄C1
NH₄C1 [s] ⇄ NH₃ [g] + HC1 [g]
Hence sublimation of such substances [Ammonium chloride] involves both - a physical & chemical change.
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