Question

While cooking in the kitchen, some foods spills over the burner of the gas

stove. As a result, the flames of the burner appears yellow and the cooking

vessel gets coated with a black substance.

a) Name the black substance that gets coated on the vessel. (1x4=4)

b) Name the fuel being used in the gas stove.

c) State two points that show why the fuel used in a gas stove is regarded

as a better fuel than wood used in ordinary chulhas.

d) Name one harmful gas which is formed by incomplete combustion of

carbon fuels.​

Answer 1

Explanation:

A. Silver develops a black coating and copper develops a green coating due to a process called corrosion.

B. gas stove is a stove that is fuelled by combustible gas such as syngas, natural gas, propane, butane, liquefied petroleum gas or other flammable gas.

C. I don't know

D. Burning hydrocarbon fuels produces carbon dioxide. Incomplete combustion creates poisonous carbon monoxide

Answer 2

Answer:

a) silver

b) LPG

c) I. It has high calorific value

II It is easy to transport

d) carbon monoxide