Test: Sorting and Separation of Materials - 1 - Class 6 MCQ

The substances that can burn easily are called as combustible substance such as coal , petrol, wood etc.

Newspaper, a book, a copy, a diary are made up of paper obtained from plants.

The sorting of objects into groups with each group having its own characteristic properties is called classification of objects. All the objects having similar characteristics properties are placed in one group different groups. And the objects having different properties are placed in different groups.
1. The classification of objects into groups makes it easier to locate them and work with them.
2. If we know the properties of any one member of the group, we can get an idea of the properties of the other members of this group.

Rust is the Result of Corrosion of Metallic Iron. Iron is oxidized to Fe²⁺(aq) at an anodic site on the surface of the iron, which is often an impurity or a lattice defect. Oxygen is reduced to water at a different site on the surface of the iron, which acts as the cathode.

The ability of a solute to get dissolved in a solvent is called as solubility.

The action of air, water on metal surface is called as corrosion. Due to corrosion metallic objects lose their lustre

Iron, silver and gold are elements while common salt is compound of sodium and chlorine.

The object through which light passes easily are called as transparent object. Clean glass, glass and thin sheet of plastic are transparent while muddy water is translucent.

Petrol is lighter than water as it floats on water surface when mixed with water.

Those substances that burn easily are called combustible substance. Ghee is animal fat, which is combustible in nature.