Materials: Metals and Non-Metals quiz

Which of the following metals is a liquid at room temperature?

The property of metals by which they can be beaten into thin sheets is called:

Which non-metal is a good conductor of electricity?

The oxide of a metal, when dissolved in water, turns:

Sodium metal is stored in:

When zinc reacts with dilute hydrochloric acid, the gas evolved is:

Which of the following reactions will not occur?

The green coating on old copper vessels is a mixture of:

Which of the following is stored under water because it catches fire in air?

Which of the following is used in the purification of drinking water?

Why are electric wires made of copper or aluminium? (2 marks)

What happens when sulphur dioxide is dissolved in water and tested with blue litmus? (2 marks)

Why is iron rust harmful? Give two methods of preventing rusting. (2 marks)

What happens when iron nails are kept in copper sulphate solution? Write the word equation. (2 marks)

Why do metals produce a ringing sound when struck? Name one use of this property. (2 marks)

How can you test whether the gas produced when a metal reacts with an acid is hydrogen? (2 marks)

Why is aluminium foil used to wrap food items? (2 marks)

Name two metals that are soft and can be cut with a knife. (2 marks)

Why do non-metals not usually displace hydrogen from dilute acids? (2 marks)

Give two uses of non-metals in daily life. (2 marks)

When 1.2 g of magnesium reacts completely with oxygen, 2.0 g of magnesium oxide is formed. How much oxygen is used? How much magnesium oxide would be formed from 3.6 g of magnesium? (3 marks)

Write balanced chemical equations for: (i) sodium reacting with water to form sodium hydroxide and hydrogen (ii) zinc displacing copper from copper sulphate solution (iii) iron displacing copper from copper sulphate solution. (3 marks)

A copper sulphate solution contains 16 g of copper sulphate. When enough iron is added, all the copper is displaced and 6.4 g of copper is deposited. If 5.6 g of iron dissolved, find the mass of iron sulphate formed using the law of conservation of mass. (3 marks)

Arrange the metals zinc, copper and iron in order of decreasing reactivity using these observations: zinc displaces iron from iron sulphate; iron displaces copper from copper sulphate; copper does not displace zinc or iron. Predict whether zinc will displace copper. (3 marks)

A piece of gold weighing 1 g can be beaten into a sheet of area about 1 m^2. A goldsmith has 15 g of gold. What area of gold leaf can he make? Which property of gold does this show? (3 marks)

Read the passage and answer the questions. In a laboratory, Paheli burnt a magnesium ribbon held with tongs. It burnt with a dazzling white flame, leaving a white powder. She dissolved the powder in water and tested the solution with litmus. (i) Name the white powder and write the balanced equation for its formation. (ii) What change did she observe in red litmus? (iii) What does this show about the nature of metal oxides? (5 marks)

Read the passage and answer the questions. A student placed a few zinc granules in a beaker of blue copper sulphate solution. After some time, the blue colour faded and a reddish-brown deposit formed. In another beaker, a copper strip placed in zinc sulphate solution showed no change. (i) Explain the change in the first beaker and write the word equation. (ii) Why was there no change in the second beaker? (iii) Name the type of reaction in the first beaker. (5 marks)

Read the passage and answer the questions. In a coastal village, iron fishing boats and gates rust quickly, while the copper water pots in homes develop a green layer over the years. (i) Why do iron objects rust faster near the sea? (ii) What is the green layer on the copper pots? (iii) Suggest two ways to protect the iron gates from rusting. (5 marks)

Read the passage and answer the questions. A teacher showed the class a piece of sodium kept in kerosene and a piece of white phosphorus kept in water. She explained that both are kept this way for safety. (i) Why is sodium kept in kerosene? (ii) Why is phosphorus kept in water? (iii) What would happen if a small piece of sodium were dropped into water? (5 marks)

Read the passage and answer the questions. Aluminium is light, strong and resistant to corrosion, so it is used to make aircraft bodies, window frames and cooking utensils. However, sour foods such as tamarind and lemon pickle are not stored in aluminium vessels. (i) Which properties of aluminium make it suitable for aircraft bodies? (ii) Why should lemon pickle not be stored in aluminium vessels? (iii) Name one other metal used for making cooking utensils and give the property that makes it suitable. (5 marks)

Draw labelled diagrams of activities to test (i) malleability by hammering (ii) electrical conductivity using a cell and bulb. Compare five physical properties of metals and non-metals with examples, and mention two exceptions. (6 marks)

Draw labelled diagrams of the burning of magnesium and of sulphur in a deflagrating spoon inside a gas jar. Explain the nature of the oxides formed, write balanced equations, and describe how litmus tests show the difference. (6 marks)

Draw a labelled diagram of the reaction of zinc granules with dilute hydrochloric acid in a test tube, showing the test of the gas with a burning splinter. Describe how metals react with water, acids and bases, giving one equation for each. (6 marks)

Draw labelled diagrams of displacement reactions using zinc and iron in copper sulphate solution. Explain the colour changes, write the word equations, and use the results to arrange zinc, iron and copper in order of reactivity. (6 marks)

Draw a labelled diagram of an experiment showing that both air and water are needed for rusting. Explain the results, describe three methods to prevent rusting, and list four uses of metals and four uses of non-metals. (6 marks)