Question

Which of the following statements is/are incorrect?

• A. An atom is the smallest particle which has the same properties as of its element.
• B. The subatomic particles for different atoms are the same.
• C. A molecule is the smallest particle which has the same properties as of its compound.
• D. A molecule of a compound remains unchanged in a chemical reaction.

Answer 1

The correct option is D

A molecule of a compound remains unchanged in a chemical reaction.

An atom is the smallest particle which has the properties of the element. For example - oxygen atom has the same properties as $O_2$.

Similarly, molecules of a compound have similar properties of the compound.

Subatomic particles like electron, proton and neutron remain the same for atoms for different elements.

But, in a chemical reaction, the molecular structure of a compound changes and the properties of the molecule also changes.