arrow_backBack to Study Resources

Quiz Chapter 1: Introduction to Chemistry

10 questions · Form 4 Chemistry Bab 1: Introduction to Chemistry

10 questions · plays in fullscreen

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. Which chemical component is commonly added as a preservative in commercial food processing?

  1. Paracetamol
  2. Sodium benzoate
  3. Urea
  4. Ethanol
Show answer

Answer: B

Sodium benzoate prevents growth of bacteria, yeasts, and molds in acidic foods.

2. What should a student immediately do if a concentrated alkali splashes onto their skin?

  1. Neutralize it with concentrated acid
  2. Rinse thoroughly with running water and report to the teacher
  3. Wipe off with dry paper towel only
  4. Apply oil over the affected area
Show answer

Answer: B

Spills on skin should immediately be flushed with plenty of running water to dilute and remove the chemical, then reported.

3. What type of variable is kept constant throughout an experiment to maintain valid results?

  1. Manipulated variable
  2. Fixed variable
  3. Responding variable
  4. Dependent variable
Show answer

Answer: B

Fixed (or controlled) variables are held constant so that only the manipulated variable affects the outcome.

4. Why must sodium metal be stored submerged under paraffin oil in the laboratory?

  1. To prevent it from reacting with moisture and oxygen in the air
  2. To stop it from evaporating into poisonous gas
  3. To prevent it from dissolving in atmospheric nitrogen
  4. To absorb ambient heat from the surroundings
Show answer

Answer: A

Sodium is a highly reactive alkali metal that reacts vigorously with water vapor and oxygen in the air.

5. Which item of personal protective equipment (PPE) specifically protects the eyes from chemical splashes?

  1. Face shield
  2. Safety goggles
  3. Lab coat
  4. Surgical mask
Show answer

Answer: B

Safety goggles form a secure seal around eyes to guard against liquid chemical splashes and dangerous fumes.

6. What is the first step in a scientific investigation sequence?

  1. Formulating a hypothesis
  2. Identifying variables
  3. Making observations
  4. Designing the experiment
Show answer

Answer: C

Scientific investigation begins with careful observation before questions are framed and hypotheses are made.

7. Which safety equipment should be used if a student's clothing catches on fire?

  1. Fume chamber
  2. Eyewash station
  3. Safety shower or fire blanket
  4. Laminar flow hood
Show answer

Answer: C

Safety showers or fire blankets rapidly smother flames on personal attire or wash away burning substances.

8. When designing a graph to present experimental data, on which axis is the responding variable placed?

  1. Y-axis (vertical)
  2. X-axis (horizontal)
  3. Z-axis (depth)
  4. Title legend axis
Show answer

Answer: A

Standard scientific convention places the manipulated variable on the X-axis and the responding variable on the Y-axis.

9. In a scientific experiment, what is the variable that is systematically altered to test a hypothesis?

  1. Responding variable
  2. Fixed variable
  3. Controlled variable
  4. Manipulated variable
Show answer

Answer: D

The manipulated variable is deliberately changed by the experimenter to observe its effects.

10. Where does the English word 'chemistry' trace its historical roots from?

  1. The Greek word 'Chemia'
  2. The Latin word 'Elementum'
  3. The Arabic word 'Al-kimiya'
  4. The Sanskrit word 'Rasayana'
Show answer

Answer: C

The term originates from the Arabic word 'al-kimiya', referencing early chemical practices and alchemy.

Sponsored