Filtration and Sublimation Concepts

The video tutorial covers two methods of separation: sublimation and filtration. Sublimation is used to separate a solid-solid mixture where one solid is sublimable. The process involves heating the mixture so the sublimable solid turns into vapor and then condenses back into a solid. An example using ammonium chloride and sodium chloride is provided. Filtration is introduced as a method for separating solid-liquid mixtures where the solid is insoluble. The technique involves using a filter paper to separate the solid residue from the liquid filtrate, demonstrated with a chalk and water mixture.

What is the process called when a solid turns directly into vapor without becoming liquid first?

• Precipitation

• Sublimation

• Condensation

• Evaporation

Which of the following is a sublimable solid?

• Sugar

• Iodine

• Salt

• Sand

In the sublimation process, where does the sublimable solid collect after cooling?

• On the walls of the funnel

• In the burner

• In the evaporating dish

• On the tripod stand

What happens to ammonium chloride when it is heated in a mixture with sodium chloride?

• It remains unchanged

• It dissolves in sodium chloride

• It melts into a liquid

• It turns into vapor

Which of the following is NOT a sublimable solid?

• Sodium chloride

• Ammonium chloride

• Naphthalene

• Camphor

What is the primary principle behind the filtration method?

• Density of liquids

• Insolubility of solids

• Boiling point of liquids

• Solubility of solids

What is the name of the liquid collected after filtration?

• Precipitate

• Filtrate

• Residue

• Solvent

In the filtration process, what is the solid left on the filter paper called?

• Filtrate

• Sediment

• Precipitate

• Residue

Which method would you use to separate chalk from water?

• Evaporation

• Sublimation

• Filtration

• Distillation

What is the role of the filter paper in the filtration process?

• To evaporate the liquid

• To trap insoluble solid particles

• To dissolve the solid

• To condense the vapor