Question

05) Give Reason:
1) Fossil fuels are called exhaustible natural resources.
2) Sodium is stored in kerosene
3) Nylon fibre is used to make ropes used for climbing rocks and parachutes.​

Answer 1

Answer:

1) fossil fuels called exaustible because their quantity will end one day end it will take many years to be recover.

2) sodium is a very reactive metal ,it vigorously react with oxygen.so it is kept in kerosene

Answer 2

Answer:

1)Fossil fuels are formed from the dead remains of living organisms. The formation of fossil fuels is a very slow process, it takes millions of years. ... Thus, fossil fuels are exhaustible natural resources.

2)Sodium are highly reactive metals and react vigorously with the oxygen, carbon dioxide and moisture present in the air such that it may even cause a fire. To prevent this explosive reaction, Sodium is kept immersed in kerosene because Sodium doesn't react with kerosene

3)Nylon fibre is used in making ropes for rock climbing and parachutes because it is a very strong fibre, elastic good wind resister and has cheap value