Chemistry MCQs
Chemistry MCQs cover organic, inorganic, physical, analytical, and biochemistry topics. Perfect for FSc, BSc, CSS, PMS, NTS, and competitive exams, they enhance concept mastery, analytical skills, speed, and accuracy for academic and job test success.
Q: An example of a diatomic molecule is:
A) CO₂
B) CH₄
C) H₂O
D) H₂
✅ Correct Answer: D
Explanation: Diatomic molecules like H₂ consist of two atoms of the same element.
Q: The bond formed by sharing electrons is known as:
A) Metallic
B) Covalent
C) Ionic
D) Van der Waals
✅ Correct Answer: B
Explanation: Covalent bonds involve sharing of electrons between atoms.
Q: NaOH is commonly known as:
A) Vinegar
B) Caustic soda
C) Bleach
D) Baking soda
✅ Correct Answer: B
Explanation: Sodium hydroxide is also called caustic soda, a strong base.
Q: Elements in the same group have similar:
A) Chemical properties
B) Mass
C) Charges
D) Densities
✅ Correct Answer: A
Explanation: Similar outer electron configurations give similar reactivity.
Q: When iron reacts with oxygen and water, it forms:
A) Rust
B) Copper oxide
C) Iron carbonate
D) Iron sulfate
✅ Correct Answer: A
Explanation: Rust is hydrated iron(III) oxide formed by oxidation.