Question

CHEMISTRY -

Name the process responsible for the following changes and define it. i.Size of naphthalene balls decreases. ii.Solid wax left out in the sun.​

Answer 1

Answer:

When water vapour present in the atmosphere or air condenses in the form of water droplets then it results in the formation of clouds.

Therefore, phenomenon for formation of clouds is known as condensation.

Drying of wet clothes is a phenomenon called vaporization as liquid state of water changes into gaseous state.

When wax melts in the sun then this phenomenon is called melting.

When solid state of matter changes directly into vapour state without undergoing liquid state then this phenomenon is known as sublimation.

Therefore, size of naphthalene ball decrease due to sublimation phenomenon.

Answer 2

Answer:

1. size of naphthalene balls decreases because of the process called sublimation.
2. solid bags left out in the sun melt because of the process called melting or liquefaction.

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