Question

what is deposition? and name three substances that undergo deposition

Answer 1

Answer:

When a substance directly changes its state from gas to solid, it is said to have undergone "Deposition".

Examples:   1. Water vapor to ice (forming frost on cold days)

                   2. Hot gases from fire changing to soot in chimneys

                   3. Ammonium chloride gas forming ammonium chloride on walls                                            of test tubes    

Answer 2

Answer:

Under certain circumstances, gas can transform directly into a solid. This process is called Deposition.

Ex: 1) Water vapor to ice - Water vapor transforms directly into ice without becoming a liquid, a process that often occurs on windows during the winter months.

2) Physical vapor to film - Thin layers of material known as "film" are deposited onto a surface using a vaporized form of the film.

3) Hot gases from fire changes into soot in the top of chimneys .by the proces sof deposition

4) Ammonium chloride gas changes into Ammonium chloride due to cooling..

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