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Test: Pure substances and mixtures - Year 8 MCQ


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10 Questions MCQ Test - Test: Pure substances and mixtures

Test: Pure substances and mixtures for Year 8 2024 is part of Year 8 preparation. The Test: Pure substances and mixtures questions and answers have been prepared according to the Year 8 exam syllabus.The Test: Pure substances and mixtures MCQs are made for Year 8 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Pure substances and mixtures below.
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Test: Pure substances and mixtures - Question 1
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A pure substance has a melting point which is always .......

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Any sample of a pure substance will have the same melting point as any other sample of the same substance. One sample of a mixture will often have a different melting point to other samples of the same mixture. If the two samples of a mixture have the same concentrations, then they will have very similar melting points
Test: Pure substances and mixtures - Question 2
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How would you separate a mixture of iron filings and sulfur?

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Sulfur is non-magnetic
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Test: Pure substances and mixtures - Question 3
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Which of these substances is a mixture?

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Water and salt are compounds, oxygen is an element
Test: Pure substances and mixtures - Question 4
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Alloys are mixtures of metals. Which is NOT an alloy?
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Chromium is an element
Test: Pure substances and mixtures - Question 5
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The method used to separate coloured dyes in ink is .......
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Chroma comes from the Greek word for colour, khroma
Test: Pure substances and mixtures - Question 6
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Which of the following is a pure substance?
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A pure substance consists of only one type of substance with definite chemical and physical properties. Gold (option C) is an element and hence a pure substance. Options A, B, and D are mixtures: air is a mixture of gases, saltwater is a mixture of salt and water, and salad is a mixture of various ingredients.

Test: Pure substances and mixtures - Question 7
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The best description of a mixture is .......
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If substances are chemically joined together they are much more difficult to separate. Alloys are mixtures that are usually hard to separate
Test: Pure substances and mixtures - Question 8
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Which of the following is not a characteristic of mixtures?
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Mixtures (option D) are composed of substances that are not chemically combined. They can be separated by physical means (option A), maintain their individual properties (option B), and can be either homogeneous or heterogeneous (option C).

Test: Pure substances and mixtures - Question 9
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In a solution made by dissolving a solid in a liquid, the hotter the solvent .......
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There is more energy at higher temperatures
Test: Pure substances and mixtures - Question 10
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Which of the following is a homogeneous mixture?
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A homogeneous mixture (option A) is uniform in composition throughout. Orange juice is a mixture where all components (water, sugars, acids, etc.) are evenly distributed. Pizza (option B), granite (option C), and trail mix (option D) are heterogeneous mixtures where you can see different components distinctly.

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