Test Prep / CustomExam Practice Test

CustomExam Practice Test

Practice test for Cambridge IGCSE Chemistry Essentials Test Prep

The CustomExam Practice Test is designed to help students practice with exam-style questions and improve their test-taking skills. This practice test covers 50 questions in 45 minutes, allowing learners to experience the format and timing of real assessments while identifying areas that need further review.

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1

What are the three states of matter?

A:Solid, liquid, and gas
B:Solid, liquid, and plasma
C:Ion, liquid, and gas
D:Solid, crystal, and gas
2

How do particles behave in a solid?

A:Particles are far apart and vibrate in fixed positions
B:Particles are tightly packed and vibrate in fixed positions
C:Particles are close together but can flow past each other
D:Particles are spread out with open spaces
3

What is the process by which particles move from an area of high concentration to low concentration?

A:Osmosis
B:Diffusion
C:Electrolysis
D:Evaporation
4

What is the total number of protons and neutrons in an atom's nucleus called?

A:Atomic number
B:Mass number
C:Isotope
D:Atomic mass unit
5

What is the process of using electricity to decompose ionic substances called?

A:Electrolysis
B:Electrolyte
C:Cathode
D:Ionic bonding
6

What is the name given to long-chain molecules formed from monomers?

A:Polymer
B:Monomer
C:Functional group
D:Alkane
7

What is the pH range of acids?

A:Less than 6
B:Less than 7
C:Greater than 7
D:Greater than 8
8

What is the percentage of oxygen in the atmosphere?

A:78%
B:21%
C:0.9%
D:0.04%
9

What is an exothermic reaction?

A:A reaction that releases energy, increasing temperature
B:A reaction that absorbs energy, decreasing temperature
C:A reaction that does not change temperature
D:A reaction that absorbs and releases energy
10

What is the general formula for alkenes?

A:CnH2n
B:CnH2n+2
C:CnHn
D:CnHn+2
11

What is eutrophication?

A:Excess nutrients cause algal blooms, depleting oxygen and harming aquatic life
B:Excess nutrients cause plants to grow faster
C:Excess nutrients cause water to become acidic
D:Excess nutrients have no effect on water quality
12

What is the main source of methane in the atmosphere?

A:Agricultural activities and waste management
B:Fossil fuels
C:Volcanic eruptions
D:Cars and trucks
13

What is the main environmental impact of burning fossil fuels?

A:Air pollution and increased greenhouse gases
B:Water pollution and increased greenhouse gases
C:Soil pollution and increased greenhouse gases
D:Increased greenhouse gases only