The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder it exists as a liquid, when it comes out from the cylinder it becomes a gas (Change – A) then it burns (Change – B).Process A and Process B both are physical changes.Process A and Process B both are chemical changes.Process A is a physical change and Process B is a chemical change.Process A is a chemical change and Process B is a physical change.None of the above.

Which of the following is not a physical change?(a) Boiling of water to give water vapour(b) Melting of ice to give water(c) Dissolution of salt in water(d) Combustion of Liquefied Petroleum Gas (LPG

hich among the following are physical or chemical changes?(a) Evaporation of petrol(b) Burning of Liquefied Petroleum Gas (LPG)(c) Heating of an iron rod to red hot.(d) Curdling of milk(e) Sublimation of solid ammonium chloride

he Process By Which Solid Change Directly To Gaseous State Without Undergoing The Liquid State Is

When a solid changes directly into a gas without melting, what is this process called?

Which of the following is an example of a chemical change?A.A solid reacting with a gas to form a new solidB.A liquid evaporating into a gasC.A mixture of a solid and a liquid formingD.A solid dissolving in a liquid