The hot air balloon rises because it has a gas that is

denser than air

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less dense than air

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equally dense as air

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the given statement is wrong

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Solution

The correct option is B less dense than air
Hot air balloon has hot air inside. Also hot air is less dense than cooler air which surrounds the hot air balloon. This means hot air is lighter than equal volume of cold air. Hence due to buoyant force of cold air, the balloon rises.

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Similar questions

Hot air is less dense than cold air.

Statement 1: on a hot day a straight road from a distance appears wet. This happens because of refraction.

Statement 2: on a hot day the air above the road in contact with the road is hotter and less dense therefore has less refractive index than the cool air above it. When light comes through denser medium to rarer medium(here cooler air to hotter air) it is internally reflected which makes the road appear wet and shiny.

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Q. A fresh egg sinks in pure water, whereas it floats in salty water. This is because
(a) salt water is denser than pure water.
(b) the egg is less dense than pure water.
(c) salt water is less dense than an egg.
(d) salt water is denser than the egg.

Q. The hot air balloon rises because it is

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The hot air balloon rises because it has a gas that is

The correct option is B less dense than airHot air balloon has hot air inside. Also hot air is less dense than cooler air which surrounds the hot air balloon. This means hot air is lighter than equal volume of cold air. Hence due to buoyant force of cold air, the balloon rises.

The correct option is B less dense than air
Hot air balloon has hot air inside. Also hot air is less dense than cooler air which surrounds the hot air balloon. This means hot air is lighter than equal volume of cold air. Hence due to buoyant force of cold air, the balloon rises.