Ordinary level 2026 BAEBOC mock chemistry 1

Chemistry Examination Questions

1. Which state of matter has a definite shape and volume?

A. Liquid

B. Solid

C. Gas

D. Plasma

2. The bond that exist in magnesium chloride, $MgCl_2$ is

A. Electrovalent

B. Simple Covalent

C. Dative covalent

D. Metallic

3. Which natural source of water lacks mineral ions

A. Spring

B. River

C. Well

D. Rain

4. The following are uses of Sulphur except?

A. Produce sulphuric acid

B. Produce matches

C. Produce sulphur concrete

D. Produce electrodes

5. Which of the following household chemicals is acidic?

A. Vinegar

B. Soap

C. Table salt

D. Kerosene

6. Select a common ore from which iron is extracted

A. Bauxite

B. Cryolite

C. Rutile

D. Haematite

7. Which of the following gases will diffuse faster in air at the same temperature?

A. $H_2$ (RMM 2)

B. $CO_2$ (RMM 44)

C. $O_2$ (RMM 32)

D. $Cl_2$ (RMM 71)

8. Determine the number of electrons, protons and neutrons in $_{20}^{40}Ca^{2+}$

A. 20, 20, 20

B. 22, 20, 20

C. 18, 20, 20

D. 20, 22, 20

9. Explain why the elements Li, Na, and K are all in group I of the periodic table

A. Because they are metals

B. Because they react violently with cold water

C. Because they have same nucleon number

D. Because their atoms have one outer electron

10. Which of the following is not a main component of crude oil?

A. Diesel oil

B. Ethanol

C. Petrol

D. gasoline

11. Aluminum burns in oxygen to produce Aluminum oxide. Select the correct equation that represents this reaction

A. $Al_{(s)} + O_{2(g)} \rightarrow AlO_{(s)}$

B. $Al_{(s)} + O_{2(g)} \rightarrow AlO_{2(s)}$

C. $4Al_{(s)} + O_{2(g)} \rightarrow 2Al_2O_{(s)}$

D. $4Al_{(s)} + 3O_{2(g)} \rightarrow 2Al_2O_{3(s)}$

12. Which air pollutant comes from the incomplete combustion of fuel

A. CO

B. NO

C. $NO_2$

D. $SO_2$

13. What is the concentration of a solution prepared by dissolving $0.5\text{g}$ of NaOH in a total volume of $250 \text{ cm}^3$ of water?

A. $0.005 \text{ mol/dm}^3$

B. $0.05 \text{ mol/dm}^3$

C. $0.005 \text{ dm}^3\text{/mol}$

D. $0.05 \text{ dm}^3\text{/mol}$

14. Which physical property of metals is responsible for metals producing a ringing sound?

A. Luster

B. Malleability

C. Sonorousness

D. Ductility

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Questions 15 to 17

Instructions: For each of these questions, one or more of the response(s) given is (are) correct.

(A) If 1, 2, and 3 are correct

(B) If 1 and 3 are correct

(C) If 2 and 4 are correct

(D) If 4 only is correct

Instructions summary
A	B	C	D
1, 2, 3 only	1, 3 only	2, 4 only	4 only

15. Given the equilibrium reaction

When pressure is increased

1. The yield of $SO_3$ increases

2. The yield of $SO_3$ reduces

3. Equilibrium position shifts to the right

4. Equilibrium position shifts to the left