Question

Choose the odd one out from the following and give reason for your choice.
A.Firewood
B.Charcoal
C.Coal
D.Petrol

Answer 1

Hint: There are different states of matter like solid state, liquid state and gaseous state. The particles in each state differ in their size, shape, interspace, and the movement etcetera. The way in which they maintain their shape on applying pressure is an important factor.

Complete step by step answer:
We can look at each of the one by one to understand the differences between them.
Firstly we take firewood, it is just the pieces of wood that are collected and used for making fire. Any piece of wood that is collected like twigs, branches, wooden log pieces etcetera can be firewood. These pieces are not refined or processed, they are just taken and then used for making fire mainly for cooking purposes in rural areas.
Next we go on to charcoal which is just super heated wood and the impurities and water is removed. They are processed in a simple way that is heated in absence of air. They are man made also. It is a black coloured solid carbon substance. It is also used for making activated carbon.
The next one is coal that is a solid fossil fuel. It is obtained by digging under the surface or mining. It is used in factories to power large machines and in some industrial plants for producing electricity.it is also a black coloured solid material mostly composed of carbon.
Now the final option is petrol. It is also a fossil fuel. Petrol is extracted from petroleum which is a natural occurring liquid that is present deep under the surface of earth.
So only the petrol has some distinct differences in these four options as it is the only substance in the liquid phase of matter.
The answer is option D petrol.

Note:All the four options are a type of non renewable source of energy. They can all be depleted if overused. So we have to be careful while using these resources and do not exploit the natural resources which can cause great disasters in the world.