arrow_backBack to Study Resources

Quiz Chapter 1: Introduction to Chemistry

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

Question 1 of 10Score: 0

Which career path directly relies on the synthesis and analysis of pharmaceutical compounds?

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 career path directly relies on the synthesis and analysis of pharmaceutical compounds?

  1. Agronomist
  2. Civil Engineer
  3. Pharmacist
  4. Geologist
Show answer

Answer: C

Pharmacy combines chemistry and medicine to synthesize, evaluate, and dispense medications.

2. Which chemical hazard category includes concentrated sulfuric acid?

  1. Flammable
  2. Explosive
  3. Corrosive
  4. Radioactive
Show answer

Answer: C

Concentrated acids destroy biological tissues and damage materials, categorizing them as corrosive.

3. 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.

4. 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.

5. 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.

6. 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.

7. Which safety apparatus is used to conduct experiments that release toxic or volatile gases?

  1. Laminar flow cabinet
  2. Fume chamber
  3. Desiccator
  4. Autoclave
Show answer

Answer: B

A fume chamber prevents toxic or flammable gases from escaping into the main laboratory space.

8. 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.

9. 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.

10. 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.

Sponsored