A. sulphur B. air C. magnesium D. carbon E. calcium. 2. Which one of the following will displace bromine from a solution of potassium bromide?
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1 1. Which of the following is not a chemical element? A. sulphur B. air C. magnesium D. carbon E. calcium 2. Which one of the following will displace bromine from a solution of potassium bromide? A. iodine B. potassium chloride solution C. chlorine D. potassium iodide solution E. potassium fluoride solution 3. An element burns in oxygen to form a solid oxide which dissolves in water. The ph of the resulting solution is greater than seven. Which of the following could the element be? A. sulphur B. phosphorus C. magnesium D. sodium E. carbon 4. What is the mass of 0.5 moles of calcium carbonate? (Atomic masses Ca = 40, C = 12, O = 16 ) A. 50 g B. 100 g C. 25 g D. 200 g E. 64 g 5. What is the chemical formula of sodium carbonate? A. NaCO 3 B. Na 2 CO 3 C. Na(CO 3 ) 2 D. NaHCO 3 E. NaNO 3 6. The nucleus of an atom with atomic number 17 has a mass number of 37. How many neutrons does the nucleus contain? A. 17 B. 37 C. 74 D. 19 E What mass of sulphur (atomic mass 32) contains the same number of atoms as 3 g of carbon (atomic mass 12)? A. 4 g B. 8 g C. 12 g D. 16 g E. 20 g 2
2 Questions 8-11 Substances can exist in each of the following forms A. freely moving molecules B. molecules held together by weak intermolecular forces C. a giant lattice of covalently bonded atoms D. positively charged ions surrounded by a "sea" of delocalised electrons E. a giant lattice of oppositely charged ions Which one of the following, listed A to E, are present at room temperature in: 8. Methane? 9. Water? 10. Sodium? 11. Potassium bromide? 12. Which of the following pairs of substances are isomers? A. 35 Cl and 37 Cl B. carbon monoxide and carbon dioxide C. hexane and cyclohexane D. butane and methylpropane E. diamond and graphite 13. When a low voltage electric current is passed through a solution of sodium chloride so that it is electrolysed. A. sodium is produced at the cathode and chlorine at the anode B. sodium is produced at the anode and sodium at the cathode C. hydrogen is produced at the cathode and chlorine at the anode D. chlorine is produced at the cathode and hydrogen at the anode E. sodium is produced at the cathode and hydrogen at the anode 3
3 14. An alkane contains 75% carbon by mass. Which one of the following is its molecular formula? (Atomic masses C = 12, H = 1) A. CH 3 B. CH 4 C. C 2 H 6 D. C 2 H 8 E. C 6 H Which one of the following does not contain ions? A. molten sodium chloride B. lime water C. glucose D. hydrochloric acid E. solid sodium chloride 16. Which of the following solutions, all of concentration 1.0 mol/dm 3, would have the highest ph value? A. ethanoic acid B. ammonium chloride solution C. water D. ammonium hydroxide solution E. hydrochloric acid 17. All elements in Group I have the same: A. atomic mass B. atomic number C. mass number D. number of electron shells E. number of electrons in the outer energy level of the atom 18. Which of the following is the balanced equation for the reaction of sodium with water? A. Na(s) + H 2 O(l) = NaoH(g) + H 2 (g) B. 2Na(s) + H 2 O(l) = NaOH(g) + H 2 (g) C. 2Na(s) + H 2 O(l) = 2NaOH(g) + H 2 (g) D. 2Na(s) + 2H 2 O(l) = 2NaoH(g) + H 2 (g) E. 2Na(s) + 2H 2 O(l) = 2NaOH(g) + H 2 (g) 4
4 19. An element M forms an oxide that contains 6.4 g of M and 0.8 g of oxygen. What is the formula of the oxide? (Atomic masses M = 64, O = 16) A. MO B. MO 2 C. M 2 O D. M 2 O 3 E. M 2 O The conversion of ethanol to ethanoic acid is an example of: A. dehydration B. hydrolysis C. oxidation D. reduction E. addition cm 3 of sodium hydroxide solution of concentration 1.0 mol/dm 3 is exactly neutralised by: A. 25 cm 3 of hydrochloric acid solution of concentration 0.5 mol/dm 3 B. 50 cm 3 of hydrochloric acid solution of concentration 1.0 mol/dm 3 C. 100 cm 3 of hydrochloric acid solution of concentration mol/dm 3 D. 25 cm 3 of hydrochloric acid solution of concentration 1.5 mol/dm 3 E. 20 cm 3 of hydrochloric acid solution of concentration 1.25 mol/dm Which compound is not in the same homologous series as ethane? A. ethene B. propane C. methane D. butane E. octane 23. Which one of the following metals does not react with hydrochloric acid? A. zinc B. magnesium C. iron D. copper E. aluminium 24. In the formation of ammonia from its elements in the gas phase N 2 (g) +3H 2 (g) = 2NH 3 (g) what volume in dm 3 of hydrogen would be required to react exactly with 120 dm 3 of nitrogen? A. 14 B. 40 C. 120 D. 360 E. 30 5
5 25. If 50 cm 3 of ethane were burned in an excess of oxygen, which one of the following volumes of carbon dioxide would be formed? (All volumes measured at the same temperature and pressure.) 2C 2 H 6 (g) + 7O 2 (g) = 4CO 2 (g) + 6H 2 O(l) A. 20 cm 3 B. 25 cm 3 C. 40 cm 3 D. 100 cm 3 E. 200 cm Which of the following is a pure compound? A. air B. petrol C. steel D. glucose E. sea water Questions The following table gives the mass of five compounds, A to E, together with the number of moles of each compound that the mass represents Compound Mass (g) Number of moles A B C D E Select from the list the compound 27. Which has a relative molecular mass of 160? 28. for which two moles have a mass of 240 g? 29. which has the greatest relative molecular mass? 30. which, if 80 g of the compound were dissolved in 1 dm 3 water, would form a solution of concentration 0.5 mol/dm 3? 6
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