Ordinary level 2026 south west regional mock chemistry 1

I’ve extracted the data from the third image, maintaining the numbering and formatting of the multiple-choice questions.

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1. Identify the change camphor undergoes when heated.

• A. Melting

• B. Sublimation

• C. Vaporization

• D. Deposition

2. Which of the following factors affects only gaseous reactions?

• A. Surface area

• B. Temperature

• C. Catalyst

• D. Pressure

3. Sodium is an element found in common salt. What is the symbol for sodium?

• A. S

• B. Sn

• C. Na

• D. K

4. What is the shape of a molecule of carbon dioxide?

• A. Trigonal planar

• B. Linear

• C. Tetrahedral

• D. Bent

Questions 8 – 9 concern the element chlorine which has an atomic number of 17 and a mass number of 35.

8. Determine the number of protons and neutrons in Cl.

• A. 17 protons, 35 neutrons

• B. 17 protons, 18 neutrons

• C. 18 protons, 17 neutrons

• D. 35 protons, 17 neutrons

9. Why is a dry sample of chlorine prepared in the laboratory collected by upward displacement of air?

• A. It is less dense than air

• B. It is slightly soluble in water

• C. It can be liquefied

• D. It is denser than air

10. Give a use of carbon monoxide.

• A. It is used in the manufacture of soft drinks

• B. It is used in the production of steel

• C. It is used in oxy-acetylene flames in cutting metals

• D. It is used in the industrial extraction of metals

11. The following is true about the principle of conservation of energy EXCEPT

• A. The total energy of a closed system remains… (text cut off in image)