Question

Which of the following are true in case of molecules?

• A. A molecule is capable of independent existence.
• B. Atoms are combined together chemically to form a molecule.
• C. Molecules of a compound have definite proportions of atoms.
• D. Molecules are indivisible particles.

Answer 1

Answer: (A), (B), (C)

The correct options are
A A molecule is capable of independent existence.
B Atoms are combined together chemically to form a molecule.
C Molecules of a compound have definite proportions of atoms.

- A molecule is a particle made up of atoms that are chemically combined together.
- A molecule is capable of an independent existence. It is the fundamental unit that defines the properties of a substance.
- Atoms combine together in definite proportions by mass to form molecules.

- For example: A molecule of water can exist independently. It is made up of hydrogen and oxygen atoms that are bonded chemically in a definite proportion (1:8) by mass.