An experiment was performed to know about the source of air for the aquatic organisms. The experiment was as follows:

Take some water in a glass vessel. Heat it slowly on a tripod stand. Before the water begins to boil, look carefully at the inner surface of the vessel. Observe the bubbles that are coming up. Where are these bubbles coming from?

The bubbles come from the air dissolved in water

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The bubbles are water bubbles

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The liquid in the beaker is not water

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The bubbles are formed due to glass vessel

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Solution

The correct option is A
The bubbles come from the air dissolved in water

The bubbles come from the air dissolved in the water. When the water was heated, the air dissolved in it escaped which came out in the form of bubbles. As the water was heated continuously, the water itself turns into vapour. The animals living in water use the dissolved air in water for respiration.

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Similar questions

John was still not satisfied with the explanation given by Sam regarding organisms that live underwater for most or all of their life. So he asked Sam to demonstrate his explanation physically so that he can have a better understanding. John simply wanted to know about the source of air for the aquatic animals.

Sam decided to use an experiment to explain John so he performed the following experiment.

He took some water in a glass vessel. Heated it slowly on a tripod stand. Well before the water began to boil, he asked John to look carefully at the inner surface of the vessel. John observed that bubbles were coming up.

John asked 'where did these bubbles come from'?

Which of the following can be Sam's answer?

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Usha took a lump of dry soil in a glass and added water to it till it was completely immersed. She observed bubbles coming out. The bubbles contain

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