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Test: Turning effect of a force - Year 8 MCQ


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10 Questions MCQ Test - Test: Turning effect of a force

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Test: Turning effect of a force - Question 1

Metals are __________

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There is no correlation between the position in the reactivity series and how well a metal conducts electricity

Test: Turning effect of a force - Question 2

Reactive metals can take the place of a less reactive metal in some reactions. This is known as .......

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In a displacement reaction, a more reactive metal can replace a less reactive metal from its compound. For example, if you place a piece of zinc in a copper sulfate solution, zinc will displace copper from the solution, forming zinc sulfate and copper metal. This is because zinc is more reactive than copper.

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Test: Turning effect of a force - Question 3

The moment of a force causes an object to

Test: Turning effect of a force - Question 4
If a metal reacts with a dilute mineral acid, the products will be .......
Detailed Solution for Test: Turning effect of a force - Question 4
Mineral acids that you may have used in your school laboratory are hydrochloric acid, sulfuric acid and nitric acid. The salt depends on the acid and metal used, so if the metal was iron and the acid was nitric, the salt would be sodium nitrate
Test: Turning effect of a force - Question 5
Zinc is more reactive than copper, so can take its place in a reaction with copper sulfate. Which is the correct word equation?
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It is just a case of swapping the zinc and copper round. A word equation shows you the starting and finishing materials
Test: Turning effect of a force - Question 6

Metal carbonates react with acids to produce carbon dioxide gas. It can be tested for using .......

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When metal carbonates react with acids, carbon dioxide gas is produced. This gas can be tested for using limewater (calcium hydroxide solution). Carbon dioxide gas turns limewater milky/cloudy due to the formation of calcium carbonate, which is insoluble in water. This reaction is a classic test for the presence of carbon dioxide gas.

Test: Turning effect of a force - Question 7

What term describes the turning effect of a force around a pivot point?

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Torque (or moment of force) is the term used to describe the turning effect of a force around a pivot point. It depends on both the magnitude of the force and the distance from the pivot point where the force is applied.

Test: Turning effect of a force - Question 8

Which of the following factors affects the torque produced by a force?

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The torque produced by a force depends on its magnitude and the perpendicular distance from the pivot point (lever arm). The direction of the force relative to the pivot point also plays a crucial role in determining the torque.

Test: Turning effect of a force - Question 9
Using your knowledge of metals and their reactions, which list places the metals in order of DECREASING reactivity?
Detailed Solution for Test: Turning effect of a force - Question 9
If you forget, you can easily look up the reactivity series but knowing the main metals in order off by heart can save time when answering questions or working out what is happening in some chemical reactions
Test: Turning effect of a force - Question 10

Which situation describes a greater torque produced by a force?

Detailed Solution for Test: Turning effect of a force - Question 10

Torque is calculated as the product of the force and the perpendicular distance (lever arm) from the pivot point to the line of action of the force. Applying a force with a longer lever arm increases the lever arm distance, thus producing a greater torque compared to applying the same force with a shorter lever arm.

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