Chemistry MCQs
Our Chemistry MCQs section is tailored for students and job seekers aiming for excellence in academic and competitive exams. It includes a vast selection of multiple-choice questions covering organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, and biochemistry. These MCQs are suitable for FSc, BSc, pre-medical, and pre-engineering students, as well as CSS, PMS, NTS, and other competitive exams in Pakistan. Designed by subject experts, the questions help reinforce key concepts, test analytical skills, and improve speed and accuracy. Each topic includes beginner to advanced-level questions with a focus on the latest syllabus and past papers. If you are preparing for university entry tests or government job recruitment exams, this resource offers an excellent opportunity to master chemistry topics effectively.
Q: Covalent bonds are common in:
A) Gases
B) Metals
C) Non-metals
D) All compounds
✅ Correct Answer: C
Explanation: Non-metals bond covalently due to similar electronegativities.
Q: The element used in nuclear fission is:
A) Carbon
B) Helium
C) Hydrogen
D) Uranium
✅ Correct Answer: D
Explanation: Uranium-235 undergoes controlled fission in nuclear reactors.
Q: The simplest hydrocarbon is:
A) Methane
B) Butane
C) Ethane
D) Propane
✅ Correct Answer: A
Explanation: Methane (CH₄) is the most basic alkane.
Q: Alkaline solutions have pH:
A) Neutral
B) Equal to 7
C) Above 7
D) Below 7
✅ Correct Answer: C
Explanation: Bases have pH values above 7.
Q: Copper reacts with nitric acid to form:
A) Methane
B) Oxygen
C) Hydrogen
D) Nitrogen dioxide
✅ Correct Answer: D
Explanation: Brown fumes of NO₂ appear when copper dissolves in nitric acid.
Q: Which oxide is acidic in nature?
A) CaO
B) CO₂
C) MgO
D) Na₂O
✅ Correct Answer: B
Explanation: Carbon dioxide forms carbonic acid in water, showing acidic character.
Q: The molecular formula of glucose is:
A) C₆H₁₂O₆
B) CH₃COOH
C) C₂H₆O
D) C₆H₆
✅ Correct Answer: A
Explanation: Glucose contains 6 carbon, 12 hydrogen, and 6 oxygen atoms.
Q: Catalysts are substances that:
A) Change products
B) Stop reactions
C) Slow down reactions
D) Speed up reactions
✅ Correct Answer: D
Explanation: Catalysts accelerate reactions without being consumed.
Q: Hardness of water is due to:
A) Ca²⁺ and Mg²⁺
B) SO₄²⁻
C) NaCl
D) Iron
✅ Correct Answer: A
Explanation: Calcium and magnesium ions make water hard.
Q: To test for hydrogen, one should:
A) Use litmus
B) Use limewater
C) Apply a glowing splint
D) Use a burning splint
✅ Correct Answer: D
Explanation: Hydrogen burns with a pop sound when exposed to flame.