SEPARATION OF SUBSTANCES

The process of settling down of particles of a solid in a liquid is

• Sublimation

• Sedimentation

• Filtration

• Decantation

While preparing chapatis, Paheli found that the flour to be used was mixed with wheat grains. Which out of the following is the most suitable method to separate the grains from the flour?

• Threshing

• Sieving

• Winnowing

• Filtration

Filtration can be used to separate...

• an insoluble solid from a solution
• a soluble solid from a solution
• a dissolved solid from a solution

Sawdust is not soluble in water. If, accidentally some particles of sawdust drop into a glass of water. How would you separate them from water?

• Decanting

• Filtering

• Sieving

• Distillation

Which technique is shown the diagram below

• seiving
• filtration
• decanting
• crystallization

How are grain seeds removed from their stalks?

• Sieving

• Winnowing

• Threshing

• All of the above

Hand picking method is effective in

• solid mixture

• Liquid mixture

• Gaseous mixture

• None of these