KCSE Chemistry Paper 1 Sample 2022
Understanding how atoms bond and react is the foundation of every chemistry problem you'll face in this exam—from predicting which compounds dissolve to calculating energy released in combustion. This sample paper tests your command of atomic structure, chemical bonding, the mole concept, and basic electrochemistry through the mix of short-answer and calculation questions you'll see on exam day. It's designed for Form 4 students preparing for the KCSE Chemistry Paper 1, and covers the exact syllabus strand that carries the most marks in Section A. Work through all 15 questions, and you'll be able to instantly recognize which bonding type produces a crystal, when to use molar mass in calculations, and how to balance redox equations without hesitation.
Questions in this quiz
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- Question 1
An atom of element X has 17 electrons. What is its electronic configuration?
- Question 2
Which of the following is an ionic compound?
- Question 3
True or False: A metallic bond is formed between a metal atom and a non-metal atom.
- Question 4
Calculate the molar mass of calcium carbonate (CaCO₃). (Relative atomic masses: Ca = 40, C = 12, O = 16)
- Question 5
How many moles of oxygen atoms are present in 4.4 g of CO₂? (Molar mass of CO₂ = 44 g/mol)
- Question 6
A reaction between zinc and hydrochloric acid produces zinc chloride and hydrogen gas. What volume of hydrogen gas (at STP) is produced when 6.5 g of zinc reacts completely? (Molar mass of Zn = 65 g/mol, 1 mole of gas at STP = 22.4 L)
- Question 7
Which solution has the lowest pH?
- Question 8
True or False: When dilute sulfuric acid reacts with sodium carbonate, carbon dioxide gas is released.
- Question 9
In the reaction: Fe → Fe²⁺ + 2e⁻, iron is being:
- Question 10
Balance the half-equation: Cu²⁺ + ___ → Cu
- Question 11
Which of the following is a redox reaction?
- Question 12
A length of zinc and copper connected in dilute sulfuric acid form a simple electrochemical cell. Which electrode acts as the anode?
- Question 13
When chlorine gas reacts with sodium hydroxide at room temperature, it produces sodium chloride, sodium hypochlorite, and water. What is the oxidation state of chlorine in sodium hypochlorite (NaClO)?
- Question 14
Which compound contains both covalent and ionic bonds?