Question

how will you separate ammonium chloride from camphor

Answer 1

Ammonium chloride can be dissolved in water while camphor doesn't.

So, if you want them to separate,
1. dissolve the mixture in water and filter the camphor.
2. get the ammonium chloride by evaporation again.

Hope this may help you..

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Answer 2

soluble in water

while camphor doesn't soluble