Introduction to chemistry — KCSE Chemistry

KCSE Chemistry · 75 practice questions · 4 syllabus objectives

27 easy24 medium24 hard

What You'll Learn

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

Introduction to chemistry

Define chemistry and state its importance in everyday life and industry

Identify major branches of chemistry and their applications

State and explain safety precautions when handling chemicals in the laboratory

Sample Questions

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easySHORT ANSWER6 marks

Define the three major branches of chemistry and give one application of each. (6 marks)

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Part (a) — 6 marks

Organic Chemistry — studies carbon-containing compounds; used in pharmaceuticals to develop new drugs (2 mks)

Inorganic Chemistry — focuses on inorganic compounds; applied in the development of catalysts for industrial processes (2 mks)

Physical Chemistry — examines the physical properties of molecules; applied in material science for creating new materials (2 mks)

easySHORT ANSWER3 marks

List three ways in which chemistry is important in the food industry. (3 marks)

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Part (a) — 3 marks

Food preservation techniques such as canning and refrigeration (1 mk)

Development of food additives for flavour and colour enhancement (1 mk)

Chemical analysis for quality control and safety testing (1 mk)

easySHORT ANSWER3 marks

Define the following terms as used in chemistry: (a) Atom (b) Molecule (c) Compound (3 marks)

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Part (a) — 3 marks

Atom: the smallest unit of an element that retains its chemical properties. (1 mk)

Molecule: a group of two or more atoms chemically bonded together. (1 mk)

Compound: a substance formed when two or more different elements chemically combine in fixed proportions. (1 mk)

Define the following terms as used in chemistry: (a) solute (b) end point of a reaction (c) solution

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Introduction to chemistry — KCSE Chemistry

What You'll Learn

Sample Questions

+72 More Questions

Why Practise Introduction to chemistry?

KNEC Aligned

Detailed Marking Schemes

Track Your Mastery

Master Introduction to chemistry for KCSE