2022 VS Chem Prelims P1

Class Register Number Name 6092/01 CHEMISTRY 22/4P/6092/1 PAPER 1 Monday 12 September 2022 1 hour VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA SCHOOL VICTORIA VICTORIA SCHOOL PRELIMINARY EXAMINATION SECONDARY FOUR Additional materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Write your name, class and index number on all the work you hand in. Do not use staples, paper clips, glue or correction fluid. There are forty questions on this paper. Answer all questions. For each question, there are four possible answers A, B, C and D. Choose the one that you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. A copy of Periodic Table is printed on page 16. This question paper consists of 16 printed pages, including the cover page. [Turn Over ���

2 ©Victoria School 22/4P/6092/1 1 Which statement about states of matter is correct? A When a liquid reaches its boiling point , it becomes a gas. This process is called evaporation. B When a gas condenses, it becomes a liquid and energy is lost to the surroundings. C When a solid changes directly to a gas, the process is called deposition. D When a solid melts, the particles get further apart and have less energy. 2 The diagram shows apparatus used to separate hexane (boiling point, 70 °C) and heptane (boiling point, 98 °C)? Which graph would be obtained if the temperature at point T was plotted against the total volume of distillate collected? ���

3 ©Victoria School 22/4P/6092/1 3 The colours in a soft drink , X, was analysed by chromatography. The experiment was performed using two different solvents, water and ethanol. The results are shown below. How would the final chromatogram appear if only mixture X was first developed in water, then turned through 90° anticlockwise and edge PQ was placed in ethanol? water ethanol B A D C X X X X ���

4 ©Victoria School 22/4P/6092/1 4 A gas is allowed to diffuse across a narrow hollow tube as shown below. Which of the following changes will not affect the rate of diffusion of the gas through the tube? A place the tube vertically B lower the temperature of the gas from 25 C to 20 C C lowering the pressure from 1 atm to 0.5 atm D replacing the nitrogen gas with carbon monoxide gas 5 Which of the following is an element and forms crystals containing polyatomic molecules? A copper B graphite C iodine D oxygen 6 The metals Cr, Co, Fe and Mn are transition elements. Which particles have the same number of electrons? A Co2+ and Cr B Co2+ and Fe3+ C Cr and Mn2+ D Fe3+ and Mn2+ 7 Naturally-occurring bromine has a relative atomic mass of 80 and consists entirely of two isotopes of relative atomic masses 79 and 81. What can be deduced about naturally-occurring bromine from this information only? A Bromine contains the two isotopes in equal proportions. B Bromine has different oxidation states. C Bromine isotopes have different numbers of protons. D Bromine is radioactive. 8 When a covalent liquid boils, its molecules become more widely spaced. Which property of the molecules has the most influence on the energy required to boil a covalent liquid? A forces of attraction between the molecules B reactivity of the molecules C size of the molecules D strength of the covalent bonds in the molecules gas narrow hollow tube ���

5 ©Victoria School 22/4P/6092/1 9 The diagram below shows three substances which can conduct electricity. What are the particles that enable them to conduct electricity? I II III A B C D electrons ions ions electrons and ions electrons atoms electrons atoms and electrons electrons electrons and ions electrons electrons and ions 10 Which statement is typical of a solid non-metal element? A It conducts electricity. B It forms an acidic oxide. C It has more than one oxidation state. D It reacts vigorously with chlorine. 11 The statements below describe elements X and Y. An atom of X has more protons than an atom of Y. An atom of Y has more valence electrons than an atom of X. Particles of X and Y combine to form an ionic structure. Which of the following statements can be deduced based on the statements above? A An atom of X has more electron shells than an atom of Y. B X forms negatively charged ions. C X and Y are in the same period of the Periodic Table. D X and Y are in the same group of the Periodic Table. + + + + + + + + + + + + + + + + + + + I II III ���

6 ©Victoria School 22/4P/6092/1 12 Part of the procedure to obtain crystals of a soluble salt is shown below. 1 25.0 cm3 of a dilute acid was accurately measured into a conical flask. 2 A known, accurate volume of alkali was gradually added to the conical flask until the solution was neutral. 3 The solution was then heated in an evaporating dish, cooled and washed with approximately 10 cm3 of cold distilled water. Which of the following shows the correct apparatus used in steps 1 to 3? 1 2 3 A burette pipette measuring cylinder B measuring cylinder burette pipette C pipette burette measuring cylinder D pipette measuring cylinder burette 13 An alloy of copper and zinc is added to an excess of dilute hydrochloric acid. The resulting mixture is then filtered. Which observations are correct? filtrate residue A colourless solution none B colourless solution red-brown C blue solution grey D blue solution none 14 Solid X is insoluble in water. It gives off a gas when heated and also when reacted with dilute sulfuric acid. What is X? A aluminium oxide B sodium carbonate C sodium nitrate D zinc carbonate 15 Hydrazine (N2H4) is a powerful reducing agent. When reacted with aqueous solution containing silver ions, nitrogen is one of the products formed. Which one of the following equations is the ionic equation of this reaction? A N2H4 + 2Ag+ → N2 + 2AgH2 B N2H4 + Ag+ → N2 + 2H2 + Ag C N2H4 + Ag+ → N2 + 4H+ + Ag D N2H4 + 4Ag+ → N2 + 4H+ + 4Ag ���

7 ©Victoria School 22/4P/6092/1 16 Ammonium chloride decomposes to form ammonia and hydrogen chloride when heated as shown in the diagram below. NH4Cl(s) ⇌ NH3(g) + HCl(g) What will be observed after some time? red litmus paper blue litmus paper A B C D turns blue turns blue then red turns blue then red