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Quiz Chapter 1: Introduction to Chemistry

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

Question 1 of 10Score: 0

What is the first step in a scientific investigation sequence?

Full Question List & Answer Key

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

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

  1. Formulating a hypothesis
  2. Identifying variables
  3. Making observations
  4. Designing the experiment
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Answer: C

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

2. Which chemical hazard category includes concentrated sulfuric acid?

  1. Flammable
  2. Explosive
  3. Corrosive
  4. Radioactive
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Answer: C

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

3. 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
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Answer: A

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

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

  1. Agronomist
  2. Civil Engineer
  3. Pharmacist
  4. Geologist
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Answer: C

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

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

  1. Paracetamol
  2. Sodium benzoate
  3. Urea
  4. Ethanol
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Answer: B

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

6. What is the primary definition of chemistry?

  1. The study of living organisms and their cell functions
  2. The branch of science dealing with forces, energy, and space
  3. The study of the composition, structure, properties, and interactions of matter
  4. The study of celestial bodies and celestial events
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Answer: C

Chemistry focuses on matter, its structure, properties, composition, and chemical reactions.

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
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Answer: B

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

8. 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
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Answer: B

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

9. 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'
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Answer: C

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

10. 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
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Answer: D

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

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