GCSE - Gcse Science - Chemistry - Alloys (Aqa) Solution - MCQGeeks.com

Q.1.

Brass is an alloy of 70 per cent copper and 30 per cent zinc. Which of the following is a use of brass?

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In electrical fittings
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In boat fittings
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In aircraft frames
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In musical instruments

Q.2.

Why does iron directly from a blast furnace have limited usefulness?

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It is too hot
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It is in the form of a big ingot
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It contains about 4% impurities, including carbon
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It is too soft

Q.3.

Aluminium is a light metal but why is it not used to make aircraft?

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It is too brittle
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It corrodes too easily
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It is too weak
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It conducts electricity

Q.4.

What is an alloy?

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A mixture of metals
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A mixture of non-metals
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A mixture of a metal with either non-metals or other metals
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A pure metal that has been shaped in a certain way

Q.5.

Which of the following is a use of ?

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Boat fittings
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Aircraft body panels
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Cables for large cranes
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All of the above

Q.6.

How is the percentage of carbon in pig iron reduced to form steels?

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By burning it off using oxygen
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By filtering it out
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By dissolving it in sulfuric acid
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By scraping it off the surface of the metal

Q.7.

Which of the following is a reason for making an alloy?

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To make a material that is transparent to light waves
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To make a corrosion resistant material
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To make a harder material
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To make a more malleable material

Q.8.

Why are alloys stronger than the materials from which they are made?

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They contain different sized atoms that 'lock' the structure
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This is only true if you use a strong metal with a weak one
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They form a chemical compound
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The heat needed to make them gives alloys their greater strength

Q.9.

Why are 'silver' coins made from an alloy or nickel plated steel and not from silver?

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Silver is too valuable
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People would keep silver coins instead of spending them
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It is too difficult to get silver into the right size and shape
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Silver is too soft