Question

Which of the following is not the state of the matter?
(A) Solid
(B) Liquid
(C) Gas
(D) Vapour

Answer 1

Hint: The form in which a matter exists is known as state of matter. There are a total of three fundamental states of matter.
As we know that anything that occupies space and has a certain mass and volume is known as matter. The form in which a matter can exist is called states of matter. There are mainly three types of state of matter i.e. solid, liquid and gas. Let us understand about some characteristics of these states of matter.

Complete step by step answer:
Solid: Solid is defined as the state of matter which possesses a definite shape and a definite volume. A substance is said to be a solid if its melting point is above room temperature under atmospheric pressure. The density of solid is high. Solids have the least compressibility and thermal expansion. Intermolecular forces between the molecules are the strongest. The position of molecules in the crystal lattice are fixed and hence solids do not have translatory rotatory motion.
Liquid: Liquid is defined as that state of matter which has a definite volume but no definite shape. They take up the shape of the vessel in which they are put. They have a lower melting and boiling point than the solids. The density of liquid is lower than those of solids. Liquids have slightly higher compressibility and thermal expansion then those of solids. Intermolecular forces of attractions are weaker than those in solids. Molecules of liquid have greater freedom of movement.
Gas: Gas is defined as the state of matter which has neither definite shape nor definite volume. Gases generally have low density. Gases possess high compressibility and thermal expansion. Gas molecules are most energetic. Intermolecular forces of attraction are almost negligible.
Hence from above, we got to know that solids, liquid and gases are the states of matter. Only vapour is not considered as the state of the matter.

So, the correct answer is Option D.

Note: There are two more types of state of matter. One of these rates is called plasma state which consists of a mixture of electrons and positively charged ions forming due to superheating of gaseous state. Another plate consists of a super cooled solid in which the atoms lose their individual identity and condense to form a single super atom.