FPSC Everyday Science MCQs

Distillation boils water and then condenses the vapor.
Nonvolatile salts remain in the original container.

Rusting is an oxidation process requiring oxygen and moisture.
It weakens exposed iron over time.

Atoms are the basic chemical units of elements.
They contain protons, neutrons, and electrons.

Galvanization covers iron or steel with zinc.
The coating blocks moisture and can protect sacrificially.

Protons carry positive electric charge.
They are located in the atomic nucleus.

Paint forms a protective barrier.
This slows the electrochemical reactions that cause rust.

Electrons carry negative charge.
They occupy regions around the nucleus.

Corrosion involves chemical or electrochemical reactions.
Rusting is a common example involving iron.

Neutrons are electrically neutral.
They are found in atomic nuclei with protons.

Acids donate protons in chemical reactions.
In water, they increase hydrogen-ion concentration.

The proton number is the atomic number.
Changing the proton number creates a different element.

Bases accept protons according to Brønsted-Lowry theory.
Many aqueous bases produce hydroxide ions.