Question

Mark the most common fluids
1- Air
2- water
3- kerosene
4- Both A and B are considered as most common fluids

Answer 1

Hint: Matter is anything that occupies space and has weight. Matter exists broadly in three states- solid, liquid and gaseous state. Now talking about fluids then we consider both the liquids and the gases under it. Liquids and gases are termed as fluids because they yield to shearing forces, whereas solids resist them.

Complete answer:
Now we look at the options given, the option (1) is air which is composed of gases and thus falls in the category of fluids. While air and water are the most basic necessity of a life without them it will be not possible to survive in this world. The second option is water which is liquid state and also comes in the category of fluids. The third option is kerosene oil, which is in the liquid state, so it is also a fluid but as compared to the first and the second option, kerosene oil is not so common, it is used as a fuel in rural areas.

So, the correct answer is “Option D”.

Note:
kerosene oil has a high calorific value and that’s why it is used as a household fuel. But on burning it harmful and toxic gases are produced which are an active ingredient of air pollution and due to this reason, it is being replaced by compressed natural gas and liquefied petroleum gas for cooking purposes.