Solid - Vapour Equilibrium

The video tutorial explains the sublimation process of solid iron in a closed vessel, where violet vapors emerge and eventually reach a constant intensity, indicating an equilibrium state. This process involves the direct conversion of solid iron into vapor, forming iron vapor. The tutorial also highlights the equilibrium between solid and gaseous iron, represented by a double-headed arrow. Additionally, examples of solid vapor equilibrium, such as ammonium chloride and chamfor, are provided.

What is observed when solid iron is placed in a closed vessel initially?

• The solid iron melts.

• The iron changes color to green.

• Violet vapors emerge.

• The vessel heats up.

At what point is the equilibrium state reached in the process involving solid iron?

• When the intensity of violet color becomes constant.

• When the violet color disappears.

• When the solid iron turns into liquid.

• When the vessel is opened.

What process does solid iron undergo in the closed vessel?

• Sublimation

• Freezing

• Condensation

• Melting

Which of the following is an example of a substance that undergoes sublimation?

• Salt

• Copper

• Ammonium chloride

• Water

What does the double-headed arrow indicate in the context of solid and gaseous iron?

• A reversible reaction

• A physical change

• A one-way process

• A chemical reaction