Now that they all knew so much about air, they shifted their discussion to a more specific topic; Oxygen. Sam being the eldest convinced both John and Kenneth that to talk about oxygen. Our life line!
Kenneth: Yes sure we should know more about oxygen.
John: Now I remember what Sam said, my teacher also said the same thing, that oxygen supports combustion.
Kenneth: That means oxygen supports burning.
Sam: Now this brings me to another question. Since we know that oxygen supports burning. There is so much oxygen present in air, why don't we all get burnt then?
Kenneth: Nitrogen is present in much larger quantity than oxygen in air around us and since nitrogen does not supports burning, it dilutes oxygen to an extent that it does not burn everything.
State whether Kenneth's answer is true or false.

True

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

False

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A True
Oxygen supports burning but since percentage of nitrogen in air is much more than that of oxygen it dilutes oxygen. Since nitrogen is not a supporter of combustion/burning it also restricts oxygen from randomly causing things to burn.

Suggest Corrections

Similar questions

Air containing oxygen is present all around us. We know that oxygen supports burning. So logically, in the presence of oxygen, even a small fire should burn down everything.

State true or false.
Air, containing oxygen, is present all around us. We know that oxygen supports burning. So logically, in the presence of oxygen, even a small fire should burn down everything.

John and Sam were soon joined by their common friend Kenneth. Kenneth got to know about the discussion John and Sam were having. He too wanted to share some of his knowledge about air and asked to join the conversation. Sam and John both welcomed him and started firing questions on him.

Sam: Kenneth, do you know about the composition of air?

Kenneth: Yes, I do! it is a mixture of gases, water vapour and dust particles.

Sam: Fine, can you tell us its composition?

Kenneth: Hmmm, I am not sure about that.

Sam: Okay, just tell us the major components of air.

So can you answer the last question that was asked to Kenneth?

They began to discuss about photosynthesis. Kenneth had good knowledge about photosynthesis so he went on to explain that plants release oxygen during the process of photosynthesis. Plants, like animals use oxygen for respiration.

Meanwhile John was curious that, why all the oxygen of atmosphere does not get used up ?Choose the correct explanation for John's question.

They started playing and at the end of the game, all three of them were panting and breathing heavily. Sam noticed that John was breathing through his mouth so he advised him to breath through nose and not through mouth.

To this Kenneth said ' how does it matter? we will be inhaling the same air whether we breathe through nose or through mouth'.

Sam gave a reasonable explanation to make Kenneth and John understand that they should breathe through our nose and not through our mouth.

What was explanation given by Sam?

Join BYJU'S Learning Program

The correct option is A TrueOxygen supports burning but since percentage of nitrogen in air is much more than that of oxygen it dilutes oxygen. Since nitrogen is not a supporter of combustion/burning it also restricts oxygen from randomly causing things to burn.

The correct option is A True
Oxygen supports burning but since percentage of nitrogen in air is much more than that of oxygen it dilutes oxygen. Since nitrogen is not a supporter of combustion/burning it also restricts oxygen from randomly causing things to burn.