Separation of Substances (class 6)

By which process Grains are separated from Stalks?

• Winnowing

• Threshing

• Harvesting

• Hand Picking

Which process is used to separate small quantity of substances?

(a)  

In which process Wind is necessary to separate substances?

(a)  

When insoluble particles settle down in water, this process is called ________.

• Decantation

• Filtration

• Sedimentation

• Crystilisation

Which processes you will use when you have to separate all things in a mixture of water, sand, sugar.

• Sedimentation, Decantation , Filtration (if required) , Evaporation

• Threshing , Filtration (if required) , Sedimentation

• Evaporation , Hand picking , Decantation

• Sedimentation, Decantation , Filtration (if required) , Evaporation, Condensation

Why do we need to separate substances?

What did you mean by Magnetic Seperation ?

• The separation of Magnetic substance from non-magnetic substance with help of sulphur.

• The separation of Magnetic substance from non-magnetic substance with help of iron.

• The separation of Magnetic substance from non-magnetic substance with help of magnet water.

• The separation of Magnetic substance from non-magnetic substance with help of Magnet.

Filtration is done when ___________.

• A) We want to remove tea leaves from tea.

• B) we want to make cottage cheese or paneer.

• C) We need to purify water.

• All of these

At Construction Sites, large sieves are seen. These help in ________________.

• A) removing sand from small stones.

• B) removing small stones from sand.

• C) Both of these

• D) None of these

Priti accidently added wheat flour to a jar half filled with sugar crystals. The two can be separated by...........

• A) Sieving

• B) Filtration

• C) Hand Picking

• D) Decantation

• Both A and B