Chemistry MCQs on atoms and molecules
Best atoms and molecules mcqs
Atoms and molecules mcqs are available in this article. These MCQs and Chemistry Notes have been designed for the best possible training and cover all of the chapter’s relevant topics.
- Which of the subsequent statements isn’t true about an atom?
a. Atoms are not able to exist independently.
b. Atoms aggregate in large numbers to make the matter that we will see, feel or touch.
c. Atoms are always neutral in nature.
d. Atoms are the essential units from which molecules and ions are
formed.
Answer — b. Atoms aggregate in large numbers to make the matter
that we will see, feel or touch.
2. Molecular mass is defined as the:
a. Mass of 1 atom compared with the mass of 1 molecule
b. Mass of 1 atom compared with the mass of 1 atom of hydrogen
c. Mass of 1 molecule of any substance compared with the mass of 1 atom of C-12
d. None of the above
Answer — c. Mass of 1 molecule of any substance compared with the mass of 1 atom of C-12
3. A change within the physical state are often caused :
a. When energy is either given to, or taken out from the system
b. only when energy is taken out from the system
c. only energy is given to the system
d. Without any energy change
Answer — a. When energy is either given to, or taken out from the system
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