Sg Chemistry - Topic 11: Metals
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Complete the general word equation:Metal + oxygen -->
Explore the properties and reactivities of metals in this engaging SG Chemistry quiz. Topics include electrical conductivity, alloy identification, and the reactivity series, crucial for understanding real-world applications like aircraft manufacturing and everyday objects.
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- 2.
Name the gas produced during this reaction of metal + acid.
Explanation
The gas produced during the reaction of metal + acid is hydrogen. Hydrogen gas is released when a metal reacts with an acid, such as hydrochloric acid or sulfuric acid. This is a common reaction known as a metal-acid reaction, where the metal displaces the hydrogen from the acid, resulting in the formation of hydrogen gas. The chemical formula for hydrogen gas is H2.Rate this question:
- 3.
Stainless steel is used to make many useful objects like cutlery and sinks. It is made from a mixture of iron, chromium and nickel. What type of substance is stainless steel?
Explanation
An alloy is a mixture of metals or metals with non-metals.Rate this question:
- 4.
Choose the alloy from the selection given.
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Copper
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Brass
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Magnesium
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Plastic
Correct Answer
A. BrassExplanation
Brass is a mixture of copper and zinc. It is used to make many objects including musical instruments.Rate this question:
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- 5.
Complete the word equation:Sodium + water --> ? + hydrogen
Correct Answer
sodium hydroxide
NaOH
Sodium hydroxideExplanation
Reactive metal + water --> metal hydroxide + hydrogenRate this question:
- 6.
Place the metals in order of reactivity (most reactive first).
Correct Answer
C A B
CAB
C, A, BExplanation
The correct answer is C A B. This means that metal C is the most reactive, followed by metal A, and then metal B. The order of reactivity is important because it determines how easily a metal can undergo chemical reactions. Metal C is the most reactive, meaning it is more likely to react with other substances compared to metal A and B. Metal A is less reactive than C but more reactive than B, and metal B is the least reactive of the three.Rate this question:
- 7.
When magnesium reacts with sulphuric acid, which of the following word equations represents this reaction.
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Magnesium + suphuric acid --> magnesium sulphide + water
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Magnesium + suphuric acid --> magnesium sulphate + water
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Magnesium + suphuric acid --> magnesium sulphide + hydrogen
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Magnesium + suphuric acid --> magnesium sulphate + hydrogen
Correct Answer
A. Magnesium + suphuric acid --> magnesium sulphate + hydrogenExplanation
metal + acid --> salt + hydrogenRate this question:
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- 8.
Put these metals in order of reactivity (most reactive first)Zinc, Tin, Copper, Aluminium, Sodium, Magnesium, Iron
Correct Answer
Sodium, Magnesium, Aluminium, Zinc, Iron, Tin, Copper
Sodium Magnesium Aluminium Zinc Iron Tin Copper
Na, Mg, Al, Zn, Fe, Sn, Cu
Na Mg Al Zn Fe Sn CuExplanation
Use MAZIT to help you to remember!Rate this question:
- 9.
In what state(s) do metals conduct electricity?
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Solid
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Liquid
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Gas
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None of the above
Correct Answer(s)
A. Solid
A. LiquidExplanation
Metals conduct electricity in both solid and liquid states. In the solid state, the metal atoms are closely packed together, allowing the free movement of electrons, which are responsible for conducting electricity. In the liquid state, the metal atoms are no longer in a fixed position, but they still retain their ability to conduct electricity due to the presence of free-moving electrons. In contrast, metals do not conduct electricity in the gas state because the atoms are too far apart and there is a lack of free electrons to carry the electric current.Rate this question:
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- 10.
Aluminum is used in the manufacture of aircraft parts. Which properties would be important for this use?
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Electrical conductor
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Thermal conductor
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Low density
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Ductile
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Strong
Correct Answer(s)
A. Low density
A. StrongExplanation
The properties of low density and strength are important for the use of aluminum in the manufacture of aircraft parts. Low density allows the aircraft to be lightweight, which is crucial for fuel efficiency and maneuverability. Additionally, strength is necessary to ensure the structural integrity of the aircraft and withstand the stresses and forces experienced during flight. Therefore, aluminum's low density and strength make it an ideal material for aircraft parts.Rate this question:
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Mar 21, 2023Quiz Edited by
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Dec 16, 2009Quiz Created by
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