Higher Chemistry, Unit 1 Questions

795 Words4 Pages
1. When copper carbonate reacts with excess acid, carbon dioxide is produced. The curves shown were obtained under different conditions. The change from P to Q could be brought about by A. increasing the concentration of the acid B. increasing the mass of copper carbonate C. Adding a catalyst D. Decreasing the particle size of the copper carbonate 2. When 3.6g of butanal (relative formula mass = 72) was burned, 134kJ of energy was released. From this result, what is the enthalpy of combustion, in kJ mol-1? A. -6.7 B. +6.7 C. –2680 D. +2680 3. Which of the following chlorides is likely to have the most ionic character? A. LiCl B. CsCl C. BeCl2 D. CaCl2 4. Which equation represents the first ionisation energy of a diatomic element, X2? A. ½ X2(s) X+(g) B. ½ X2(g) X-(g) C. X(g) X+(g) D. X(s) X-(g) 5. Which of the following elements exists as discrete molecules? A. boron B. carbon (diamond) C. silicon D. sulphur 6. Which of the following chlorides is most likely to be soluble in tetrachloromethane, CCl4? A. barium chloride B. caesium chloride C. calcium chloride D. phosphorus chloride 7. In which of the following liquids does hydrogen bonding occur? A. ethanoic acid B. ethyl ethanoate C. hexane D. hex-1-ene 8. A compound boils at –33oC. It also dissolves in water to give an alkaline solution. Which type of bonding is present within the compound? A. metallic B. covalent (polar) C. ionic D. covalent (non-polar) 9. The number of moles of ions in 1 mol of copper(II)phosphate is A. 1 B. 2 C. 4 D. 5

More about Higher Chemistry, Unit 1 Questions

Open Document