Question

Match the statements in Column A, with those in Column B :

Column 1	Column 2
The process due to which a liquid changes to gaseous state at a fixed temperature by the absorption of heat energy.	Rise in temperature
A change takes place in a substance on the absorption of heat energy when no change of the state or dimensions takes place.	Sublimation
A process due to which a solid directly changes to gaseous state on the absorption of heat energy.	Evaporation
The process due to which certain substances burn in air or oxygen releasing a large amount of heat energy.	Vaporisation
The process of change of liquid into gas at any temperature.	Combustion.

Answer 1

Explanation for Part A

1. The process of conversion of liquid state into gaseous state at fixed temperature by absorption of heat is known as vaporisation.
2. The fixed temperature at which vaporisation takes place is known as the vaporisation point.
3. Water at 100°C will gets converted into water vapour or steam, here water is undergoing the process of vaporisation and vaporisation point of water is 100°C.

Explanation for Part B

1. The degree of hotness is known as temperature.
2. When a substance is absorbing heating energy, the hotness of the substance will increase hence the temperature of the substance will also rise.
3. It is not mandatory that the state and dimensions of a substance will change with temperature.
4. A change takes place in a substance on the absorption of heat energy when no change of the state or dimensions takes place is rise in temperature.

Explanation for Part C

1. The process of conversion of solid state directly into the gaseous state without getting converted into liquid state at a fixed temperature by absorbing heat energy is known as sublimation.
2. The substances like naphthalene, ammonium chloride, and camphor will directly get converted from solid-state to the gaseous state by absorbing heat, here the process of sublimation happened to these substances.

Explanation for Part D

1. The process due to which certain substances burn in air or oxygen releasing a large amount of heat energy is known as combustion.
2. For example : Burning of candle, burning of wood, burning of paper etc.

Explanation for Part E

1. The process of conversion of liquid state into gaseous state at any temperature below its vaporisation point is known as evaporation.
2. Evaporation is a slow process as compared to vaporisation.
3. Evaporation is a surface phenomena.

Final answer

The correct matches are

Part A - IV

Part B - I

Part C - II

Part D - V

Part E - III