Separation of Substances | Chapter Assessment | English | Grade 6

Match the columns.

• ( a ) - ( iii ) ( b ) - ( i ) ( c ) - ( ii )

• ( a ) - ( iii ) ( b ) - ( ii ) ( c ) - ( i )

• ( a ) - ( ii ) ( b ) - ( i ) ( c ) - ( iii )

• ( a ) - ( ii ) ( b ) - ( iii ) ( c ) - ( i )

Answer explanation

The method of winnowing can be used when a mixture contains ___________ .

• Both heavier particles

• Both lighter particles

• One heavier and one lighter particles

• None of these

Answer explanation

The method of winnowing can be used when a mixture contains one heavier and one lighter particles. E.g. husk is easily separated from grains by the process of winnowing.

Which of the following can be used for threshing?

• Cattles

• Beating

• Thresher machine

• All of these

Answer explanation

Cattles, beating of plants to stalks to separate grains, thresher machines, all can be used for threshing purpose.

Sieving occurs due to which of the following factors?

• Difference in weight

• Difference in size

• Difference in weight and size

• Difference in color

Answer explanation

Sieving occurs due to difference in sizes of the particles in the mixture. E.g. In mixture of sand and pebbles, pebbles are of larger size and sand particle are of smaller size.

In a mixture, a liquid and an insoluble substance can be separated by ______ method.

• Filtration

• Evaporation

• Churning

• None of these

Answer explanation

In a mixture, a liquid and an insoluble substance can be separated by filtration method.

In a saturated solution of sugar and water, No more sugar can be dissolved. What will you do to dissolve more sugar?

• Heat the solution

• Add more water in the solution

• Stir it vigorously

• Both 1 and 2

Answer explanation

By heating solution or adding more water to the solution, more sugar can be easily added. So, option 4 is the correct answer.