Chemistry MCQs for 2nd-year class

By: Prof. Dr. Fazal Rehman | Last updated: May 23, 2025

1. : When the hydroxyl group is attached to the carbon atom bonded to two other carbon atoms, the alcohol formed is
(A) Secondary alcohol
(B) Primary alcohol
(C) Tertiary alcohol
(D) Quaternary alcohol

2. : Sodium metal is soft due to
(A) Strong metallic bond
(B) Weak metallic bond
(C) Hydrogen gas
(D) Hydroxides

3. : Alcohol (CnH₂n+1OH) with the lowest molecular mass at room temperature is
(A) Liquid
(B) Solid
(C) Gas
(D) B and C

4. : Elements which have properties of metals and non-metals are
(A) Metalloids
(B) Crystalline
(C) Amorphous
(D) None of the above

5. : As the size of atom increases down a group, electropositivity
(A) Consistent
(B) Decreases
(C) Increases
(D) None of the above

6. : The chemical formula of Zinc Hydroxide is
(A) ZnOH
(B) ZnO₂
(C) Zn₂(OH)₄
(D) Zn(OH)₂

7. : Bromine is a non-metal in
(A) Gaseous state
(B) Plasma state
(C) Solid state
(D) Liquid state

8. : K₂O + H₂O →
(A) KOH
(B) K(OH)₃
(C) KOH
(D) KO + H₂ + O₂

9. : Compared to beryllium, magnesium is
(A) Large in size
(B) More electropositive
(C) Less electropositive
(D) Both A and B