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Chlorine and its compounds — KCSE Chemistry

KCSE Chemistry · 59 practice questions · 4 syllabus objectives

20 easy23 medium16 hard

What You'll Learn

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

Describe the laboratory preparation of chlorine from MnO₂ and concentrated HCl with equation

State the physical and chemical properties of chlorine and describe its bleaching action

Describe the uses of chlorine and chlorine compounds and discuss associated health and environmental concerns

Chlorine and its compounds

Sample Questions

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1
easySHORT ANSWER2 marks

State two health risks associated with exposure to chlorine gas. (2 marks)

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Part (a) — 2 marks
Respiratory issues such as coughing and difficulty breathing (1 mk)
Irritation to skin and eyes, potentially causing burns (1 mk)
2
easySHORT ANSWER3 marks

Identify three uses of chlorine compounds in household products. (3 marks)

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Part (a) — 3 marks
Household bleach (sodium hypochlorite) for cleaning and disinfecting surfaces (1 mk)
Chlorine tablets for disinfecting swimming pool water (1 mk)
Chlorinated products used in laundry detergents for stain removal (1 mk)
3
easySHORT ANSWER2 marks

State the balanced equation for the preparation of chlorine gas using MnO₂ and concentrated HCl. (2 marks)

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Part (a) — 2 marks
MnO₂(s) + 4HCl(conc.) → MnCl₂(aq) + 2H₂O(l) + Cl₂(g). (2 mks)
4

Explain how chlorine gas is prepared in the laboratory using manganese(IV) oxide and concentrated hydrochloric acid. Include the chemical equation. (4 marks)

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Why Practise Chlorine and its compounds?

KNEC Aligned

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