Question

Match the columns.

Column 1	Column 2
Solids	Compound consisting of nitrogen and hydrogen
Liquids	Exists as single atom
Gases	Fixed mass, shape and volume
Ammonia	Very weak interparticle forces of attraction
Krypton	Take the shape of the containers they are stored in

Answer 1

(A)- (III) Solids - Fixed mass, shape, and volume

• The solid-state is one of the fundamental states of matter.
• Solids differ from liquids and gases by the characteristic of rigidity.
• The molecules of solids are tightly packed because of strong intermolecular forces; they only oscillate about their mean positions.
• Whereas, whereas liquids and gases possess the property of fluidity and can easily flow.
• Solids can be defined as the state of matter which has a definite shape and volume and has a rigid structure.
• Solids possess the least compressibility and thermal expansion.

(B)- (V) Liquids - Take the shape of the containers they are stored in

• The molecules in a liquid are closely packed due to weak intermolecular forces.
• These forces are weaker than solids but stronger than that gases.
• There is much space in between the molecules of liquids which makes their flowing ability easy.
• Liquids can easily acquire a vessel's shape and have a fixed volume.
• The conversion of solids into liquids takes place when we increase the temperature of solids to a point where solids begin to melt.
• Generally, the density of liquid lies between the density of solids and gases. The compressibility and thermal expansion of liquids are slightly higher than that of solids.

(C)- (IV) Gases - Very weak interparticle forces of attraction

• In this state of matter, the distances between the molecules are large.
• The intermolecular forces experienced between them are negligible.
• Thus, translatory, rotatory, and vibratory motions are observed prominently in gases.
• Gases do not have any fixed shape or volume.
• They also possess high compressibility and thermal expansion.

(D)- (I) Ammonia - Compound consisting of nitrogen and hydrogen

• When two or more elements chemically combine in a fixed ratio by mass, the obtained product is known as a compound.
• Compounds can be defined as substances consisting of 2 or more different types of elements in a fixed ratio of their atoms.
• When the elements combine, some individual property of the elements is lost and the newly formed compound has new properties.

(E)- (II) Krypton - Exists as a single atom

• The noble gases, also known as inert gases and aerogens, are the elements that belong to group 18 of the modern periodic table.
• These are not reactive at all so they are found as a single atom.
  The elements that belong to this group are:
• Helium $\left(\mathrm{He}\right)$
• Neon$\left(\mathrm{Ne}\right)$
• Argon$\left(\mathrm{Ar}\right)$
• Krypton$\left(\mathrm{Kr}\right)$
• Xenon$\left(\mathrm{Xe}\right)$
• Radon$\left(\mathrm{Rn}\right)$

(A)Solids	(III)Fixed mass, shape, and volume
(B)Liquids	(V)Take the shape of the containers they are stored in
(C)Gases	(IV)Very weak interparticle forces of attraction
(D)Ammonia	(I)Compound consisting of nitrogen and hydrogen
(E)Krypton	(II)Exists as a single atom