Question

Which of the following statements about a compound is incorrect?
A.) A molecular of a compound has atoms of different elements.
B.) A compound can’t be separated into its constituent elements by physical methods of separation.
C.) A compound retains the physical properties of its constituent elements.
D.) The ratio of atoms of different elements in a compound is fixed.

Answer 1

Hint: Here we know that compound is a combination of different atoms or molecules In this question we have to check different properties or specifications of compounds. And there is a huge difference between pure substances, compounds and elements.

Complete step by step solution:
We know that a compound is a material formed by chemically bonding two or more chemical elements. The type of bond between elements in a compound can be covalent bonds and ionic bonds. Compounds have fixed ratios of elements.
A chemical compound is composed of many identical molecules composed of atoms from more than one element held together by chemical bonds.

There are four types of compounds, depending on how the atoms are held together:
Molecules are held together by covalent bonds.
And ionic compounds are bonded together by ionic bonds.
Inter metallic compounds are held together by metallic bonds.
And certain complex compounds are held together by coordinate covalent bonds.

From the above explanation we can say that when elements or atoms or molecules combine to form compounds then their properties will change.
So, the correct answer is “Option C”.

Note: A mixture and compound are two different entities because a mixture is formed when two or more substances are physically mixed together. When two or more substances are chemically combined through a chemical reaction then a compound is formed. A molecule consisting of atoms of only one element is therefore not a compound.