Group VII properties — Paper 1 · IGCSE Sciences - Co-ordinated (Double) 0654

21 The gas from a leaking cylinder is tested by using damp litmus paper. The damp litmus paper is bleached. What is the gas? A ammonia B chlorine C hydrogen D oxygen

1 marks

Answer: B

This question in 0654/11 May/June 2007

27 Elements X and Y react together to form a compound. The diagram shows the outer shells of X and Y after reaction. X electron Y electron outer shell of X outer shell of Y after reaction after reaction Which statement is correct? A X is in group VII and has formed the X+ ion. B X is in group VII and has formed the X– ion. C X is in group VIII and has formed the X+ ion. D X is in group VIII and has formed the X– ion.

1 marks

Answer: B

This question in 0654/11 Oct/Nov 2010

15 The diagram shows part of the Periodic Table. W Y X Z Which two elements would be the most reactive in their group? A W and Y B W and Z C X and Y D X and Z

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2011

22 The elements in a Group of the Periodic Table are solid at 20 °C. The reactivity of the elements increases down the group. Which statements about this group of elements and their oxides are correct? the elements are in their oxides are A Group I acidic B Group I basic C Group VII acidic D Group VII basic

1 marks

Answer: B

This question in 0654/12 Oct/Nov 2013

16 The diagram shows the energy change for the reactions between hydrogen and the halogens. The size of the energy change is different for each halogen. H2 + X2 energy change energy 2HX reaction The reaction is H2 + X2 → 2HX The diagram shows that the reactions are ……1…… . The most reactive halogen is ……2…… and therefore the energy change for this element is ……3…… . Which words complete gaps 1, 2 and 3? 1 2 3 A endothermic fluorine least B endothermic iodine least C exothermic fluorine greatest D exothermic iodine greatest

1 marks

Answer: C

This question in 0654/13 Oct/Nov 2013

24 Which Group I metal and which Group VII non-metal react together most vigorously? Group I Group VII A potassium bromine B potassium chlorine C sodium bromine D sodium chlorine

1 marks

Answer: B

This question in 0654/11 May/June 2014

24 Which Group I metal and which Group VII non-metal react together most vigorously? Group I Group VII A potassium bromine B potassium chlorine C sodium bromine D sodium chlorine

1 marks

Answer: B

This question in 0654/12 May/June 2014

25 Which Group I metal and which Group VII non-metal react together most vigorously? Group I Group VII A potassium bromine B potassium chlorine C sodium bromine D sodium chlorine

1 marks

Answer: B

This question in 0654/13 May/June 2014

21 The diagram shows a chemical reaction that produces a gas. damp litmus paper reaction mixture heat The gas bleaches damp litmus paper. What is the gas? A ammonia B chlorine C hydrogen D oxygen

1 marks

Answer: B

This question in 0654/11 May/June 2015

22 Which statement about the elements in Group VII of the Periodic Table is correct? A Chlorine displaces bromine from potassium bromide. B The colour of the elements becomes darker up the group. C The melting point of the elements decreases down the group. D The reactivity of the elements increases down the group.

1 marks

Answer: A

This question in 0654/11 May/June 2015

17 The diagram shows the electrolysis of a compound. switch + – P Q electrolyte When the switch is closed, the solution around electrode P turns orange because a halogen is formed. The positive electrode P is called the ……1……, and the halogen is ……2…… . Which words complete gaps 1 and 2? 1 2 A anode bromine B anode chlorine C cathode bromine D cathode chlorine

1 marks

Answer: A

This question in 0654/11 May/June 2016

22 A green halogen gas is bubbled through a potassium halide solution. The potassium halide solution turns brown–black. What is the halogen and what is the potassium halide solution? halogen potassium halide solution A bromine potassium chloride B bromine potassium iodide C chlorine potassium bromide D chlorine potassium iodide

1 marks

Answer: D

This question in 0654/11 May/June 2016

17 The diagram shows the electrolysis of a compound. switch + – P Q electrolyte When the switch is closed, the solution around electrode P turns orange because a halogen is formed. The positive electrode P is called the ……1……, and the halogen is ……2…… . Which words complete gaps 1 and 2? 1 2 A anode bromine B anode chlorine C cathode bromine D cathode chlorine

1 marks

Answer: A

This question in 0654/13 May/June 2016

22 Four statements about Group VII elements are listed. 1 Iodine reacts with both chloride ions and bromide ions. 2 Chlorine reacts with both bromide ions and iodide ions. 3 Chlorine reacts with bromide ions but not with iodide ions. 4 Bromine reacts with iodide ions but not with chloride ions. Which two statements are correct? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: C

This question in 0654/13 May/June 2017

24 The melting points of three elements in Group I and of three elements in Group VII are shown. element group melting point (°C) lithium I 179 sodium I 98 potassium I 64 chlorine VII –101 bromine VII –7 iodine VII 114 What is the trend in reactivity in each group as melting point increases? change in Group I change in Group VII reactivity reactivity A less reactive less reactive B less reactive more reactive C more reactive less reactive D more reactive more reactive

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2017

21 The halogens are elements in Group VII of the Periodic Table. They are … 1 … non-metals. They become … 2 … in colour down the group. Which words complete gaps 1 and 2? 1 2 A diatomic darker B diatomic lighter C monatomic darker D monatomic lighter

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2019

22 Which statement about the halogens is not correct? A They are members of Group VII of the Periodic Table. B They are non-metals. C They become darker in colour down the group. D They exist as monoatomic gases.

1 marks

Answer: D

This question in 0654/12 May/June 2020

23 Which statement about the elements from chlorine to iodine in Group VII of the Periodic Table is correct? A They are all gases at room temperature. B Their boiling points decrease. C Their colours become paler. D Their reactivities decrease.

1 marks

Answer: D

This question in 0654/13 Oct/Nov 2020

17 The diagram shows the energy change for the reactions between hydrogen and the halogens. The reaction is H2 + X2  2HX. The size of the energy change is different for each halogen. H2 + X2 energy change energy 2HX progress of reaction The diagram shows that the reactions are ……1…… . The most reactive halogen is ……2…… and therefore the energy change for this element is ……3…… . Which words complete gaps 1, 2 and 3? 1 2 3 A endothermic fluorine least B endothermic iodine least C exothermic fluorine greatest D exothermic iodine greatest

1 marks

Answer: C

This question in 0654/12 Feb/March 2021

17 The diagram shows the electrolysis of a compound. switch + – P Q electrolyte When the switch is closed, the solution around electrode P turns orange because a halogen is formed. The positive electrode P is called the ……1……, and the halogen is ……2…… . Which words complete gaps 1 and 2? 1 2 A anode bromine B anode chlorine C cathode bromine D cathode chlorine

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2021

17 The diagram shows the electrolysis of a compound. switch + – P Q electrolyte When the switch is closed, the solution around electrode P turns orange because a halogen is formed. The positive electrode P is called the ……1……, and the halogen is ……2…… . Which words complete gaps 1 and 2? 1 2 A anode bromine B anode chlorine C cathode bromine D cathode chlorine

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2021

20 A gas turns damp litmus paper white. What is the gas? A carbon dioxide B chlorine C hydrogen chloride D sulfur dioxide

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2021

21 Which statement about the elements in Group I and in Group VII of the Periodic Table is correct? A Chlorine has a darker colour than iodine. B Each molecule of a halogen contains one atom. C Potassium reacts with cold water more vigorously than lithium. D The melting point of lithium is lower than the melting point of sodium.

1 marks

Answer: C

This question in 0654/13 Oct/Nov 2021

21 Which statement about the halogens is not correct? A Iodine has a darker colour than chlorine. B They all exist as diatomic molecules. C They are all gases at room temperature. D They are all non-metals.

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2022

21 Which statements about the elements in Group VII of the Periodic Table are correct? 1 Only one of them is a liquid at room temperature. 2 Their colours become darker down the group. 3 Their melting points and boiling points decrease down the group. 4 They are all metallic elements called halogens. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: A

This question in 0654/12 Oct/Nov 2022

24 Which element is used in the manufacture of sulfuric acid? A carbon B hydrogen C nitrogen D sulfur

1 marks

Answer: D

This question in 0654/13 May/June 2023

21 Which statements about the halogens are correct? 1 They are diatomic metals. 2 Their atoms have seven outer-shell electrons. 3 Going down the group, they change from solid to liquid to gas. 4 Going down the group, they become darker in colour. A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: C

This question in 0654/12 Oct/Nov 2023

20 A piece of damp blue litmus paper is put in a test-tube of a gas. The litmus paper turns red and then changes to white. What is the gas? A ammonia B carbon dioxide C chlorine D oxygen

1 marks

Answer: C

This question in 0654/13 Oct/Nov 2023

22 The halogens are elements in Group VII of the Periodic Table. They are … 1 … non-metals. They become … 2 … in colour down the group. Which words complete gaps 1 and 2? 1 2 A diatomic darker B diatomic lighter C monatomic darker D monatomic lighter

1 marks

Answer: A

This question in 0654/12 Feb/March 2024

22 Which statement about the halogens is correct? A They become lighter in colour down the group. B They are all gases at room temperature. C They are members of the same period of the Periodic Table. D They exist as diatomic molecules.

1 marks

Answer: D

This question in 0654/12 Oct/Nov 2024

22 Which statement about the halogens is correct? A They become lighter in colour down the group. B They are all gases at room temperature. C They are members of the same period of the Periodic Table. D They exist as diatomic molecules.

1 marks

Answer: D

This question in 0654/13 Oct/Nov 2024