Chemistry 9-1 4CH1: Principles of chemistry Topical Past Paper Questions
Edexcel IGCSE (9-1) Chemistry 9-1 (4CH1) past-paper questions on Principles of chemistry, free. This topic is frequently examined across 13 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
(a) Paint can be used to coat iron, which protects iron from rusting. (i) Give the chemical name for rust. (ii) Explain how painting prevents iron from rusting. (b) Steel is made from iron and carbon. (2) Explain how the difference in malleability of pure iron and high-carbon ste…
A teacher adds a small piece of lithium to water and collects the gas produced. (a) (i) Give two observations when lithium is added to water. (2) (2) (ii) The teacher adds a few drops of universal indicator to the solution at the end of the reaction. Explain the final colour of t…
(a) Describe the forces of attraction in metallic bonding. (2) (b) When a small piece of potassium is added to water, bubbles of hydrogen gas are observed. (i) Give the test for hydrogen gas. (ii) Give two other observations that would be made. (2) (c) Explain why lithium is less…
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