Question

Which of the following is not a property of compounds?
(A) They are made up of two or more kinds of atoms.
(B) They cannot be broken down into two or more simpler substances by physical means but by chemical means only.
(C) Properties of compounds differ from those of their elements.
(D) None of the above.

Answer 1

Hint : Chemical compounds have a unique chemical structure. In a compound atoms are held together in a defined spatial arrangement. They are held together by covalent bonds or ionic bonds. Compounds are the substances which are made up of more than one kind of atoms.

Complete Step By Step Answer:
Compounds are the chemical substances which are composed of many identical molecules that are also called molecular entities which are composed of atoms from more than one element which are held together by chemical bonds. It means option A is a property of compounds.
They cannot be broken down into two or more simpler substances by physical means but by chemical means only. For example, if we take the example of a water molecule that is ${H_2}O$ , it is an example of a compound made up of two molecules of hydrogen and one atom of oxygen. As we know, we cannot separate water physically, that is we cannot separate hydrogen and oxygen atoms physically but we can separate them chemically. It means option B is a property of compounds.
Properties of compounds are different from those of their elements. As again if we consider water molecules, water is used to extinguish fire but if we consider the property of hydrogen and oxygen separately, hydrogen and oxygen both help fire to grow. It means option C is a property of compounds.
So, option D is correct.

Note :
In Covalent bond sharing of electrons takes place between two atoms. This bond occurs between elements that present near to each other in the periodic table. Elements that are close to each other on the periodic table tend to have similar electronegativities, which means they have a similar affinity for electrons.