How does water help in extinguishing the fire ?
Water helps in extinguishing the fire in two ways :
(i) It brings the temperature of the combustible material below its ignition temperature. As a result, the fire gets extinguished.
(ii) The water vapour formed due to the heat of fire cuts to supply of air. Due to the absence of air (supporter of combustion), the fire gets extinguished.
State two disadvantages of incomplete combustion.
The wick in a spirit lamp does not burn while the spirit in it burns. Give two reasons for the wick not burning.
What should be done to control fire due to oils ?
How is acid rain formed ?
