Question

Find the odd one out of Plastic, Rubber, Glass, Silver
(A)Glass
(B)Rubber
(C)Silver
(D)Plastic

Answer 1

Let’s write the basic properties of these four given substances to see what they have in common and in what properties do they differ from each other. We will then draw comparison among these four substances and pick the odd one out.

Complete step by step answer:
Writing the basic properties of these substances –
Plastic: It is an amorphous solid. They melt at a very high temperature range. They are poor conductors of heat and electricity. Plastic is generally used as an insulator.
Rubber: It is an amorphous solid. It is highly elastic in nature i.e. it can be stretched to a great extent. It is a poor conductor of electricity. It shows resistance to abrasion and tearing (because of its elastic nature).
Glass: It is also an amorphous solid. They also melt over a range of temperatures. Generally ,melt at lager temperatures.
Silver: It belongs to the category of metallic solid. It is a good conductor of heat and electricity. It has a number of free electrons in its valence shell. In fact, silver is the best thermal and electrical conductor of all metals. Because of this, it is used for many electrical purposes.

Now drawing the similarities between the four ,we observe that plastic, rubber, glass belong to amorphous solids while silver is a metallic solid. Also,all the three i.e. plastic, rubber, glass are bad conductors of electricity while silver is a good conductor of electricity.
Silver is the odd one here.
Hence ,option (C) is correct.

Note: The substances which allow electricity to pass through them are called good conductors of electricity. The substances which do not allow the electricity to pass through them are called bad conductors of electricity or insulators. Generally, metals are good conductors of electricity.