Laboratory apparatus and safety — KCSE Chemistry

KCSE Chemistry · 55 practice questions · 4 syllabus objectives

16 easy19 medium20 hard

What You'll Learn

Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.

Identify and state the uses of common laboratory apparatus

State laboratory safety rules and explain reasons for each rule

Describe first-aid procedures for common laboratory accidents

Laboratory apparatus and safety

Sample Questions

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1
easySHORT ANSWER3 marks

List three first-aid steps to take if a student accidentally spills a chemical reagent on their skin. (3 marks)

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Part (a) — 3 marks
Immediately rinse the affected area with plenty of water for at least 15 minutes (1 mk)
Remove any contaminated clothing or accessories near the affected area (1 mk)
Seek medical attention if irritation or pain persists after rinsing (1 mk)
2
easySHORT ANSWER6 marks

State three laboratory safety rules that should be followed when conducting experiments with corrosive chemicals and explain why each rule is important. (6 marks)

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Part (a) — 3 marks
Wear appropriate personal protective equipment such as gloves and goggles (1 mk)
Work in a well-ventilated area or fume hood (1 mk)
Store corrosive chemicals in proper labeled containers (1 mk)
Part (b) — 3 marks
To protect skin and eyes from potential burns or injuries (1 mk)
To minimise inhalation of harmful fumes that can cause respiratory issues (1 mk)
To prevent accidental spills and ensure correct identification of hazardous materials (1 mk)
3
easySHORT ANSWER4 marks

List four pieces of laboratory apparatus and their specific uses in a chemistry experiment. (4 marks)

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Part (a) — 4 marks
Beaker - used for holding and mixing solutions (1 mk)
Burette - used for delivering a measured volume of liquid (1 mk)
Conical flask - used for containing reactions and preventing spillage (1 mk)
Test tube - used for holding small amounts of substances during reactions (1 mk)
4

Identify the laboratory apparatus used for each of the following purposes: (a) Heating a substance to very high temperatures, (b) Measuring the pH of a solution, (c) Storing volatile liquids, (d) Mixing two or more substances in a controlled manner. (4 marks)

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Why Practise Laboratory apparatus and safety?

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