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HKDSE Chemistry – A Modern View Part II Microscopic World I © Aristo Educational Press Ltd. 2009 107 Chemistry: Chapter 7 Chemical bonding: ionic bonding Combined Science (Chemistry Part): Chapter 7 Chemical bonding: ionic bonding 1. Which of the following ions is NOT a cation? A. Silver ion B. Iron(II) ion C. Hydroxide ion D. Aluminium ion □ 2. Which of the following ions is an anion? A. Permanganate ion B. Manganese(II) ion C. Magnesium ion D. Mercury(II) ion □ 3. Which of the following is a simple ion? A. Co 2+ B. SO 3 2  C. NH 4 + D. OH  □ 4. Which of the following combinations about the colour of the ions is correct? Ions Colour A. Copper(II) ion Reddish brown B. Cobalt(II) ion Pink C. Dichromate ion Yellow D. Permanganate ion Orange □

HKDSE Chemistry – A Modern View Part II Microscopic World I © Aristo Educational Press Ltd. 2009 108 5. Which of the following aqueous solutions is yellow in colour? A. Iron(III) nitrate B. Nickel(II) sulphate C. Potassium dichromate D. Sodium bromide □ 6. Which of the following ions can be seen to migrate in an electric field? A. Sulphate ion B. Chloride ion C. Permanganate ion D. Hydroxide ion □ 7. Consider the following diagram about the migration of ions. Which of the following observations is correct? A. Purple spot moves towards the electrode A . B. Blue spot moves towards electrode B . C. Orange spot moves towards electrode B . D. No observable change. □ s mall crystal of copper(II) dichromate electrode A electrode B

HKDSE Chemistry – A Modern View Part II Microscopic World I © Aristo Educational Press Ltd. 2009 109 8. Which of the following ions are coloured? (1) Cu 2+ (aq) (2) Cr 2 O 7 2  (aq) (3) K + (aq) A. (1) and (2) only B. (1) and (3) only C. (2) and (3) only D. (1), (2) and (3) □ 9. The charge of sulphate ion is A. 1+ B. 2+ C. 1  D. 2  □ 10. Which of the following ions has 1  charge? A. Ammonium ion B. Hydrogencarbonate ion C. Sulphite ion D. Chromate ion □ 11. Which of the following ions does NOT have 1+ charge? A. Dichromate ion B. Hydrogen ion C. Silver ion D. Potassium ion □ 12. Which of the following formulae does NOT stand for an ion? A. H + B. NCl 3 C. NH 4 + D. OH  □

HKDSE Chemistry – A Modern View Part II Microscopic World I © Aristo Educational Press Ltd. 2009 110 13. Which of the following formulae and names of ions is matched INCORRECTLY? Formula Name A. H + Hydrogen ion B. NH 4 + Ammonium ion C. Zn 2+ Zinc(II) ion D. Cu 2+ Copper(II) ion □ 14. Which of the following formulae and names is matched correctly? Formula Name A. Cl  Chloride ion B. NO 2  Nitride ion C. S 2  Sulphate ion D. OH  Hydrogenate ion □ 15. Which of the following formulae of ions is correct? A. NO 3 + B. SO 4  C. CO 3 2  D. Br + □ 16. Which of the following ions has a charge of 2+? A. Oxide ion B. Dichromate ion C. Aluminium ion D. Zinc ion □ 17. Which of the following ions is positively charged? A. Ammonium ion B. Chloride ion C. Phosphide ion D. Permanganate ion □

HKDSE Chemistry – A Modern View Part II Microscopic World I © Aristo Educational Press Ltd. 2009 111 18. In magnesium chloride, Mg 2+ ion is formed by A. gaining 2 protons from the chlorine atoms. B. losing 2 outermost shell electrons from magnesium atom. C. losing 2 outermost shell electrons from the magnesium ion. D. gaining 2 electrons from the outermost shell of another magnesium atom. □ 19. Which of the following statements about magnesium atom and magnesium ion is correct? A. Both of them have 12 protons in the nucleus. B. Both of them have the same chemical properties. C. Both of them have 2 outermost shell electrons. D. Both of them have the same physical properties. □ 20. A magnesium ion, Mg 2+ , has the same number of electrons as A. a neon atom, Ne. B. a sodium atom, Na. C. a fluorine atom, F. D. an aluminium atom, Al. □ 21. A sodium atom and a sodium ion A. have the same number of electrons. B. have the same chemical properties. C. are isotopes. D. have the same number of neutrons. □ 22. An atom W has 12 electrons and its mass number is 24. Which of the following combinations showing the number of protons and neutrons of an ion W 2+ is correct? Protons Neutrons A. 12 12 B. 10 10 C. 10 12 D. 12 10 □

HKDSE Chemistry – A Modern View Part II Microscopic World I © Aristo Educational Press Ltd. 2009 112 23. The table below gives atomic numbers of four atoms. Atom Atomic number P 17 Q 18 R 19 S 20 Which of the following atoms can form an ion with a charge of 1+? A. P B. Q C. R D. S □ 24. The diagrams below show the electronic diagrams of four atoms. A. B. C. D. Which of the following atoms can form an ion with a charge of +1? A. P B. Q C. R D. S □

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