VI_SCIENCE_SEPARATION OF SUBSTANCES

Filtration is a method to separate the components of a-

• solution

• mixture of a liquid and an insoluble substance

• both (a) and (b)

• pure substance

Threshing is done by-

• beating

• bullocks

• machines

• all of these

Which method is used to separate pebbles and stones from sand?

• Handpicking

• Seiving

• Winnowing

• Threshing

The components of a solution (say sugar in water) can be separated by

• Filtration

• Evaporation

• Decantation

• Sedimentation

The process of conversion of water vapours into liquid is called

• Condensation

• Evaporation

• Sedimentation

• Decantation

Mixtures need to be separated because-

• to remove undesirable substances

• to get desirable substances

• to obtain highly pure substances

• all of these

Cream is separated from milk by the process of _____.

Sedimentation can be done more quickly by adding ……………… into it.

Components retain their properties in a _____.

Air is a mixture of ____.