FPSC MCQs

Acid and base properties cancel during neutralization.
The products commonly include a salt and water.

Antacids contain mild bases.
They reduce acidity and relieve symptoms such as heartburn.

The stomach secretes hydrochloric acid.
It helps activate digestive enzymes and kill many microbes.

Vinegar contains dilute acetic acid.
This acid gives vinegar its sour taste and preservative effect.

Citrus fruits such as lemons and oranges contain citric acid.
It contributes to their sour taste.

Muscle cells can produce lactate during anaerobic metabolism.
This supports short-term energy production when oxygen delivery is limited.

Acid-carbonate reactions form a salt, water, and carbon dioxide.
The gas causes visible bubbling.

Baking soda is sodium hydrogen carbonate, NaHCO₃.
It releases carbon dioxide when heated or mixed with acid.

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.