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Year 8 Exam  >  Year 8 Tests  >  Year 8 Chemistry (Cambridge)  >  Test: Chemical Changes - Year 8 MCQ

Test: Chemical Changes - Year 8 MCQ


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10 Questions MCQ Test Year 8 Chemistry (Cambridge) - Test: Chemical Changes

Test: Chemical Changes for Year 8 2024 is part of Year 8 Chemistry (Cambridge) preparation. The Test: Chemical Changes questions and answers have been prepared according to the Year 8 exam syllabus.The Test: Chemical Changes MCQs are made for Year 8 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Chemical Changes below.
Solutions of Test: Chemical Changes questions in English are available as part of our Year 8 Chemistry (Cambridge) for Year 8 & Test: Chemical Changes solutions in Hindi for Year 8 Chemistry (Cambridge) course. Download more important topics, notes, lectures and mock test series for Year 8 Exam by signing up for free. Attempt Test: Chemical Changes | 10 questions in 20 minutes | Mock test for Year 8 preparation | Free important questions MCQ to study Year 8 Chemistry (Cambridge) for Year 8 Exam | Download free PDF with solutions
Test: Chemical Changes - Question 1
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Which of the following is an example of a chemical change?

Detailed Solution for Test: Chemical Changes - Question 1
Burning wood results in new substances being formed, which is a characteristic of a chemical change.
Test: Chemical Changes - Question 2
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What is the word equation for the reaction between hydrogen and oxygen to form water?

Detailed Solution for Test: Chemical Changes - Question 2

The word equation for the formation of water is Hydrogen + Oxygen → Water.

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Test: Chemical Changes - Question 3
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Which of the following is a pure substance?

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Carbon dioxide is a compound and is considered a pure substance, whereas the others are mixtures.
Test: Chemical Changes - Question 4
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How can you tell if a process is exothermic?
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An exothermic process releases heat, causing the temperature of the surroundings to increase.
Test: Chemical Changes - Question 5
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What is the correct word equation for the combustion of methane?
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The word equation for the combustion of methane is Methane + Oxygen → Carbon dioxide + Water.
Test: Chemical Changes - Question 6
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Which of the following best describes an endothermic reaction?
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An endothermic reaction absorbs heat from the surroundings.
Test: Chemical Changes - Question 7
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Which mixture is an example of a homogeneous mixture?
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A homogeneous mixture has a uniform composition throughout, like salt dissolved in water.
Test: Chemical Changes - Question 8
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Which of the following is an example of a chemical change?
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Rusting of iron (option C) is a chemical change because it involves a chemical reaction between iron, oxygen, and water to form iron oxide (rust), which has different properties than iron itself. Melting ice (option A), dissolving sugar in water (option B), and cutting a piece of paper (option D) are physical changes where the substance retains its chemical identity

Test: Chemical Changes - Question 9
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Which of the following is not evidence of a chemical change?
Detailed Solution for Test: Chemical Changes - Question 9

A change in state (solid to liquid) (option C) is a physical change because the substance remains chemically the same (ice melting to water, for example). Options A, B, and D are evidence of chemical changes: production of a gas (option A) indicates a chemical reaction, change in color (option B) can indicate a change in chemical composition, and formation of a precipitate (option D) suggests a chemical reaction has occurred.

Test: Chemical Changes - Question 10
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Which of the following statements best describes a chemical change?
Detailed Solution for Test: Chemical Changes - Question 10

A chemical change (option C) involves a chemical reaction where one or more substances are converted into different substances with different properties. Options A, B, and D describe characteristics of physical changes rather than chemical changes: option A describes reversibility (physical change), option B describes a change in state (physical change), and option D describes a change in appearance (physical change).

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