Question

 Which petroleum product is used for surfacing of roads?
A.Paraffin wax
B.Lubricating oils
C.Bitumen
D.Coal tar

Answer 1

Hint: For surfacing of roads bitumen is used. It is used in road construction because it is easy to produce and reuse. It is non toxic in nature. Further it also has a strong binder.

Complete step by step solution: For surfacing of roads bitumen is used. Talking about how bitumen is used in road surfacing. Bitumen is made up of by-product which is obtained from the refined crude oils. It is used in road construction because it is easy to produce, reuse. It is non toxic in nature. Further it also has a strong binder.
Talking about other petroleum which is mentioned in the question is lubricating oils. It is interesting to note that the lubricating oils are also called lubricants. They are called so as they help in reducing the friction from any surface. Lubrication is very important to make an old machine run like new as by lubricating it the friction is reduced which further makes the machine to work smoothly. These also help in reducing the temperature as they carry away the heat.
Then talking about the paraffin wax, it is basically a petroleum product which is further used for moistening the skin cells and  further also helps to loosen the joints and fingers before any exercise. It is generally used by therapists also. 
Discussing the last option which is a coal tar, it is a thick dark liquid which is used in medical and industry. It is obtained as a by-product of coal gas and coke. It is also used in road making.

Hence, option C is the correct answer for the given question.

Note: Since, bitumen is a black, sticky liquid that is highly viscous that cannot be used for combustion. It Has excellent water proof property that is why it is used to build highways, motorways and rail networks. Other uses are sound proofing the rooms and emulsion paints.