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Chemistry MCQs

Practice Chemistry multiple-choice questions for Riphah International University competitive exams. Each question includes the correct answer and a short explanation, and past-paper questions are marked so you can revise both repeated and fresh material in one place.

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Proton

Neutron

Electron

Positron

وضاحتElectrons are negatively charged subatomic particles that orbit the nucleus.

Above 7

Exactly 7

Below 7

0 to 14

وضاحتOn the pH scale, values below 7 indicate acidity, while values above 7 indicate alkalinity.

Nitrogen

Oxygen

Neon

Hydrogen

وضاحتNeon is a noble gas (Group 18), characterized by a full valence shell, making it chemically inert.

HCl

H2SO4

HNO3

NaOH

وضاحتSulfuric acid is a mineral acid composed of elements sulfur, oxygen, and hydrogen with the formula H2SO4.

Groups

Families

Periods

Blocks

وضاحتHorizontal rows in the periodic table are referred to as periods, while vertical columns are groups.

Covalent bond

Ionic bond

Hydrogen bond

Metallic bond

وضاحتIonic bonds occur due to the electrostatic attraction between oppositely charged ions created by electron transfer.

-1

Dependent on the element

وضاحتBy definition, the oxidation state of an atom in its elemental form is zero.

Oxygen

Nitrogen

Carbon

Hydrogen

وضاحتCarbon is the sixth element in the periodic table, having 6 protons in its nucleus.

Combination

Decomposition

Single displacement

Double displacement

وضاحتIn a double displacement reaction, the cations and anions of two compounds switch places to form two new compounds.

Oxygen

Carbon Dioxide

Nitrogen

Argon

وضاحتNitrogen makes up approximately 78% of Earth's atmosphere.

Frequently Asked Questions

Are these Chemistry MCQs free?

Yes. Every Chemistry MCQ on this page is free to practice, including the correct answer and explanation.

Do these include past-paper questions?

Yes — questions sourced from past papers are clearly marked with a "Past Paper" badge, alongside fresh practice questions.

Which exams do these Chemistry MCQs help with?

They are aimed at Riphah International University and related Pakistani competitive exams that test Chemistry.

How should I practice subject-wise MCQs?

Attempt each question first, then reveal the answer and read the explanation. Short, focused sessions on one subject work better than long unstructured reading.