Question

why the neck of a glass funnel is covered with wet filter paper in sublimation process?

Answer 1

Explanation:

It's to slow the rise of the warm gases going up the neck of the funnel and out into the room so they can cool and have a chance to deposit the crystals on the funnel. It could also catch some crystals so you don't lose them out the top.

Answer 2

The neck of a glass funnel is covered with wet filter paper in sublimation process because it will slow down the rising of the warm gases and it will prevents them from escape.

Explanation:

• During the process of sublimation the main purpose behind conduction of this process is to help the formation of crysatls without any difficulty.
• Putting a wet filter paper above the neck of the funnel ensure ensure that the gases that arise from the reactions taking place inside the container will rise above and try to move out through the neck of the funnel.
• But addition of wet filter paper, slow this process and doesn't allow the gas to move out immediately and slowing down the reaction thereby helping in process of crystallization.

To know more:

What is sublimation ? How is naphthalene  sublimated ? How does the process of sublimation  help in purifying an impure sample ?

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