英皇_2006_mock_chem_I_Samuel

英皇_2006_mock_chem_...

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Unformatted text preview: Prepared by Dr. Samuel Chong CHEMISTRY Paper 1 Dr. Samuel Chong Dr. Samuel Chong z z z z z z A,B C z z 04 05 (SWA) z 2006-CE-CHEM 1-1 2006-CE CHEM PAPER 1 HONG KONG CERTIFICATE OF EDUCATION EXAMINATION CHEMISTRY PAPER 1 Question-Answer Book 8:30 am 10:15 am (1 3 / 4 hours) This paper must be answered in English 1. This paper consists of TWO sections, Section A and Section B. Section A carries 54 marks and Section B carries 36 marks. 2. Answer ALL questions in each section. 2006-CE-CHEM 1-2 - 2 - by Dr. Samuel Chong Chemistry Team SECTION A Answer ALL questions. 1. The following flow diagram shows a list of processes about limestone and other calcium containing substances. Limestone heat compound A + gas B Limewater slaked lime (a) (i) What is the chemical name of limestone? (ii) State the expected observation if dilute hydrochloric acid is added to limestone. (b) (i) Name compound A and gas B? (ii) State the colour you expected to observe in flame test of compound A. (iii) Suggest a chemical test to identify gas B. (c) What is the chemical name of slaked lime? State one daily use of slaked lime. (8 marks) water gas B water 2006-CE-CHEM 1-3 - 3 - by Dr. Samuel Chong Chemistry Team 2. There is a mixture of gases in the atmosphere. The following is the arrangement of atoms of one of the gases, oxygen gas. (a) State the types of force present in oxygen gas. (b) (i) Suggest a method to separate oxygen gas from other gases in the atmosphere. (ii) State the underlying principle of the method. (c) If oxygen is liquefied, do you think that it is a good conductor of electricity? Explain. (6 marks) 2006-CE-CHEM 1-4 - 4 - by Dr. Samuel Chong Chemistry Team 3. For each of the following pairs of substances, suggest a chemical test to distinguish one substance from the other and state the expected observations. (a) concentrated sulphuric acid and concentrated nitric acid (b) propene and propan-1-ol (4 marks) 2006-CE-CHEM 1-5 - 5 - by Dr. Samuel Chong Chemistry Team 4. The following experiment is to study the electrolysis of lead(II) bromide. P and Q are zinc electrodes while R and S are carbon electrodes....
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英皇_2006_mock_chem_...

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