Question 1

Which of the following best describes the main purpose of the mole concept in chemistry?

Accepted Answer

To count the number of particles (atoms, molecules, or ions) in a given sample.

Question 2

A student is asked to prepare a salt in the laboratory. Which of the following safety procedures should they follow FIRST before starting the experiment?

Accepted Answer

Read and understand the safety data sheets for all chemicals involved.

Question 3

Which of the following is NOT a transferable skill developed by studying IGCSE Chemistry?

Accepted Answer

Financial accounting

Question 4

A sample contains 12 grams of carbon-12. What is the number of moles present in the sample? (Molar mass of carbon-12 = 12 g/mol)

Accepted Answer

1 mole

Question 5

Which of the following best illustrates the application of chemical energetics in a real-world scenario?

Accepted Answer

Calculating the energy released when gasoline combusts in a car engine.

Question 6

A student is given a mixture of sand and salt. Which experimental technique should they use to separate the two substances?

Accepted Answer

Filtration followed by evaporation

Question 7

Which statement about the periodic table is correct?

Accepted Answer

Elements are arranged in order of increasing atomic number.

Question 8

During an experiment, a student records the following data: mass of reactant used, temperature change, and time taken for the reaction. Which skill are they primarily demonstrating?

Accepted Answer

Data analysis

Question 9

Which of the following is a correct use of scientific communication in chemistry?

Accepted Answer

Writing chemical equations using standard notation and symbols.

Question 10

A chemical reaction is observed to occur faster at higher temperatures. Which concept does this observation best illustrate?

Accepted Answer

Reaction rates

Question 11

Which of the following is an example of applying stoichiometry in a real-life context?

Accepted Answer

Calculating the amount of fertilizer needed for a field based on a chemical equation.

Question 12

A student is tasked with extracting a metal from its ore. Which topic from the syllabus does this activity most closely relate to?

Accepted Answer

Metals

Question 13

Which of the following best demonstrates the impact of chemistry on the environment?

Accepted Answer

Analyzing the effects of acid rain on plant life.

Question 14

A student needs to determine the concentration of an unknown acid solution. Which laboratory technique should they use?

Accepted Answer

Titration

Question 15

Which of the following is a key aim of the Cambridge IGCSE Chemistry syllabus?

Accepted Answer

To develop experimental skills and understand the impact of chemistry on society.

Question 16

A student is asked to write a balanced chemical equation for the reaction between hydrochloric acid and sodium hydroxide. Which assessment objective does this task primarily test?

Accepted Answer

Knowledge with understanding

Question 17

Which of the following best describes the role of Avogadro's number in chemistry?

Accepted Answer

It is the number of particles in one mole of a substance.

Question 18

A student is planning an experiment to investigate the effect of concentration on reaction rate. Which variable should they keep constant to ensure a fair test?

Accepted Answer

Temperature of the reaction mixture

Question 19

Which of the following is an example of using scientific data to solve a problem?

Accepted Answer

Calculating the yield of a product using measured masses from an experiment.

Question 20

A student is asked to explain why water boils at a lower temperature at high altitude. Which main topic from the syllabus does this question relate to?

Accepted Answer

States of matter

Cambridge IGCSE Chemistry 0620: Syllabus Overview and Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards