Combustion And Flame

In the sun, heat and light are produced by

• Rapid combustion

• Explosion

• Nuclear reactions

Carbon Dioxide being lighter than oxygen covers the fire like a blanket

• True

• False

_________ is used to increase the friction of rubbing surface in a matchbox

• Red phosphorus

• Glass powder

• Antimony trisulphate

• Pottasium chlorate

Pinewood dipped in ____________ were used as matches in ancient Egypt

The three essential requirements for combustion are

• Fuel, heat, Ignition temperature

• Fuel, air, combustible substance

• Fuel, oxygen, heat

In modern day matches, Pottasium chlorate in the matchstick reacts with white phosphorus to ignite____________

Explosion can also take place if _____________ is applied on the cracker

A combustion takes place at a high speed is also known as

• Rapid combustion

• Spontaneous combustion

• Explosion

• Nuclear reaction

What are the constituents of foam type fire extinguisher

• Sodium bicarbonate and HCL

• H₂SO₄ and HCL

• Sodium bicarbonate and H₂SO₄

• Sodium bicarbonate and baking soda

Combustion is also called____________ reaction