Beatty 14.4_METALS_REVIEW(W4)_2023_Answers

1 Beatty Secondary School Science Department (Chemistry Unit) Chemistry 6092 Name: ___________________________________ ( ) Date: ________________ Class: 4E___ TOPIC: METALS REVIEW Multiple-Choice Questions 1 Which statement is not true for all metals? A They are malleable. B They conduct electricity. C They conduct heat. D They form coloured compounds. ( D ) 2 Which metal carbonate melts on heating but does not decompose? A calcium carbonate B magnesium carbonate C sodium carbonate D zinc carbonate ( C ) 3 Which compound does not give off a gas when heated? A hydrated copper(II) sulfate B hydrated sodium carbonate C magnesium carbonate D sodium carbonate ( D ) 4 When heated, solid X gives off a gas. When the gas is bubbled into limewater, a white precipitate is formed. The residue after heating solid X reacts with dilute acid and also with aqueous alkali. What is X? A copper(II) carbonate B magnesium carbonate C sodium carbonate D zinc carbonate ( D ) 5 The thermal stability of metal nitrates is related to the position of the metal in the reactivity series in the same way as carbonates. Which metal nitrate, on heating, will decompose to form the metal? A iron(III) nitrate B potassium nitrate C silver nitrate D sodium nitrate ( C ) 6 The carbonates of metals X and Y were heated in air. The carbonate of metal X changed colour from green to black when heated and carbon dioxide was given off. The carbonate of metal Y did not decompose. Which statements are correct? 1 Metal X is more reactive than metal Y. 2 Both metal carbonates would react with dilute nitric acid to form carbon dioxide. 3 Metal X could be a transition element. A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only ( D )

2 7 The diagram compares the amount of carbon in two steels, P and Q. Which two diagrams correctly compare the strength and brittleness of P and Q? ( A ) 8 Metals W, X, Y and Z are placed in salt solutions as shown in the table. metal result of placing metal in solution of salt of W salt of X salt of Y salt of Z W no reaction X displaced Y displaced no reaction X no reaction no reaction no reaction no reaction Y no reaction X displaced no reaction no reaction Z W displaced X displaced Y displaced no reaction What is the order of reactivity of the metals from most reactive to least reactive? A Y → X → W → Z B Y → W → Z → X C Z → W → Y → X D Z → Y → X → W ( C )

3 9 Metal X is more reactive than metal Y which is more reactive than metal Z. The sulfates of X and Z are colourless; the sulfate of Y is blue. Which observation is correct? metal added to solution of sulfate solution of sulfate colour change A X Y blue → colourless B Y X colourless → bl