Choose the correct option for the statement given below.

Warm air is heavier than cold air.

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True because warm air contains more heat.

True because warm air molecules are separated by greater distances

False because molecules of warm air expand and become less dense.

False because cold air contains extra temperature than hot air.

answer is C.

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Detailed Solution

Concept- Density and volume exist in the air. The density and volume of a gas are inversely related. Because of the increased heat energy of the molecules in warm air, the distance between them grows. Density decreases with increasing molecular distance.
Various gases are present in the air. Nitrogen makes up 78% of the air in Earth's atmosphere and oxygen makes up 21%. Neon, hydrogen, and carbon dioxide are also present. Air molecules have tremendous energy when heated or heated up, which causes them to move more quickly and increase the distance between them.
The mass-to-volume ratio of gas determines its density. For a given mass, density is inversely proportional to volume. Air expands, resulting in a rise in gas volume and a decrease in density as the space between its molecules increases. Over more dense air, less dense air floats. Therefore, warmer air is lighter than colder air. therefore, warmer air is heavier than colder air The molecules of heated air expand and become less dense, making the statement (3) False.
Hence, the correct answer is option 3.

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