Question

Why we use cotton plug to cover the glass funnel during the process of sublimation?

Answer 1

We use cotton plug to stop the sublime moving out of the glass funnel

Answer 2

Explanation: The cotton plug slows down the Rise of the the warm gases and prevents their escape during sublimation. We use it to Cotton plug To to stop the sublime moving out of the funnel .On heating the mixture ammonium chloride changes into white vapours .These rise up and get converted into solid Ammonium chloride on coming in contact with the cold .

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