Test: Sorting and Separation of Materials - Class 6 MCQ

Camphor being sublim able in nature, is separated by sublimation.
Iron filings being magnetic in nature, are separated by magnetic separation method. Sand particles being larger in size and insoluble in water, are separated by filtration. They are obtained in the filter paper, j On evaporating the filtrate, salt is separated.

First, magnetic particles (Z) are | separated from the mixture by magnetic separation and then heavier particles (X) and lighter particles (Y) are separated by ! winnowing.

Separation of K and M would be most difficult because both the substances are soluble in water, non-magnetic and have same colour.

Vaseline is immiscible in water as it does not mix completely with water. Metal spoon is hard and lustrous. Cardboard is opaque as it does not allow the passage of light through it. Cotton ball first floats and then sinks when placed in water. This is because once it floats, it starts absorbing water, thus, it becomes heavy and will ultimately sink.

• The substance X is glass. It is transparent as it passes the light through it. It is smooth and an insulator.
• The substance Y is gold. Gold has a yellow metallic lustre and is a good conductor.
• The substance Z is plastic as it is man-made.