NCERT Class VIII Science Solutions: Chapter 5-Coal and Petroleum Part 1

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Question 1:

What are the advantages of using CNG and LPG as fuels?

Answer:

The advantages of using CNG and LPG as fuels are:

  • They are used as non-polluting fuels to transport vehicles.

  • LPG and CNG both are easy to store and transport.

  • CNG is used for power generation.

  • These fuels have more energy per unit volume.

  • LPG can be used directly for burning in homes and factories.

  • These are easily available and have affordable cost.

  • LPG and CNG has virtually no ash particles left after burning.

Result for CNG and LPG as fuels

CNG and LPG as Fuels

Result for CNG and LPG as fuels

Question 2:

Name the petroleum product used for surfacing of roads.

Answer:

Bitumen is the petroleum product used for surfacing of roads. It is black, sticky, highly viscous liquids present in crude petroleum separated by fractional distillation.

Image result for bitumen

Result for Bitumen

Image result for bitumen