LVSS PRELIM 2023 4NA SCI CHEM P3

LOYANG VIEW SECONDARY SCHOOL Preliminary Examination 2023 Secondary Four Normal (Academic) CANDIDATE NAME : ……………………………………………………………….......... CLASS : …………………. INDEX NUMBER : ……………. SCIENCE (CHEMISTRY) 5105/03 Paper 3 Multiple Choice 3 Aug 2023 Papers 3 and 4: 1 hour 15 minutes Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number on the Answer Sheet in the spaces provided unless this has been done for you. There are twenty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Answers to Paper 3 and Paper 4 must be handed in separately. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. You are advised to spend no more than 30 minutes on Paper 3. You may proceed to answer Paper 4 as soon as you have completed Paper 3. Any rough working should be done in this booklet. A copy of the Periodic Table is printed on page 10. The use of an approved scientific calculator is expected, where appropriate. Setter: Mdm Elvina Abu Hasan This paper consists of 10 printed pages.

2 1 Students do an experiment that produces a soluble gas. Which apparatus allows them to measure the volume of the gas most accurately? A B C D 2 The table shows the boiling points of some of the elements present in air. element boiling point / oC argon −186 helium −269 neon −246 nitrogen −196 oxygen −183 Which elements are liquid at −200 oC? A argon, helium and neon B argon, nitrogen and oxygen C helium and neon only D nitrogen and oxygen only

3 3 Which changes occur when a liquid at 80 °C becomes a gas at 140 °C? distance between particles energy of particles A decreases decreases B decreases increases C increases decrease D increases increases 4 A chromatography test was carried out on the contents of a fizzy drink to find out which colourings it contains. The results of the chromatogram is shown below. Which two colourings are found in the fizzy drink? A 1 and 3 B 2 and 4 C 2 and 5 D 3 and 4 5 The structures of four atoms are given in the table below. atom number of protons number of electrons number of neutrons W 15 15 15 X 16 16 16 Y 15 15 17 Z 16 18 16 Which pair of atoms are isotopes? A W and X B W and Y C X and Y D X and Z fizzy drink 1 2 3 4 5 colouring

4 6 Magnesium metal reacts with chlorine gas to form magnesium chloride. Which substance could be magnesium chloride? melting point solubility in water conducts electricity solid liquid A high insoluble no yes B high soluble no yes C low insoluble no no D low soluble yes yes 7 Four different mixtures of gases are made. Which diagram represents a mixture consisting of elements only? 8 Butenedioic acid has the structure shown below. What is the molecular formula of butenedioic acid? A C2H2O2 B C4H4O2 C C4H4O4 D C6H4O4

5 9 Four different solutions, W, X, Y and Z, are tested with Universal Indicator. solution W X Y Z colour with Universal Indicator green red purple orange Which solution(s) is / are acidic? A W and Z B X only C X and Z D Y only 10 Element Y forms an oxide that reacts with both acids and bases. Which row is correct for element Y? type of element type of oxide A metallic amphoteric B metallic basic C non-metallic acidic D non-metallic amphoteric 11 Elements X, Y and Z are in Group VII of the Periodic Table. X is a gas. Y is less reactive than Z. Z is a red liquid. When X, Y and Z are placed in order of increasing proton number , which is the correct order? A X → Y → Z B X → Z → Y C Y → X → Z D Y → Z → X

6 12 Antacid tablets are taken to relieve indigestion. In an experiment, dilute sulfuric acid is added to antacid tablets in the apparatus shown. The gas given off is bubbled through limewater. A white precipitate forms in the limewater. What do the antacid tablets contain? A magnesium B magnesium carbonate C magnesium hydroxide D magnesium oxide 13 The results of adding some metals to salt solutions are as follows: copper + zinc sulfate → no reaction magnesium + zinc sulfate → magnesium sulfate + zinc copper + silver sulfate → copper(II) sulfate + silver What is the order of reactivity of the metals? most reactive least reactive magnesium copper zinc silver magnesium zinc copper silver silver copper zinc magnesium zinc magnesium silver copper A B C D

7 14 The table below describe the reactions between three metals X, Y and Z with cold water and steam. reaction with cold water reaction with steam X no reaction reacts slowly to form hydrogen gas Y no reaction no reaction Z reacts readily to form hydrogen gas reacts violently to form hydrogen gas What could be the identities of metals X, Y and Z? X Y Z A copper lead magnesium B iron lead calcium C zinc sodium copper D zinc potassium silver 15 Which row describes the trends in melting point and reactivity down Group I? trend in melting point trend in reactivity A decreases down the group increases down the group B decreases down the group decreases down the group C increases down the group increases down the group D increases down the group decreases down the group 16 Lubricating oil is obtained from crude oil. What is lubricating oil used for? A as fuel for aircraft engines B as fuel for heating and cooking C for making polishes and waxes D for making road surfaces

8 17 The diagram below shows a section of an oil refinery which separates crude oil into useful fractions. What are the fractions X, Y and Z? X Y Z A petrol lubricating oil kerosene B petrol kerosene bitumen C diesel kerosene lubricating oil D lubricating oil petrol bitumen 18 Margarine is manufactured by passing hydrogen through unsaturated vegetable oils to form a solid product. Which type of reaction is involved in this process? A addition B displacement C neutralisation D substitution 19 Cracking is a process where big alkane molecules are passed over a solid catalyst at a high temperature to produce a mixture of alkanes. Dodacane, C 12H26, can be cracked to produce two products as shown in the equation below. C12H26 → 2C5H10 + hydrocarbon Z What is the chemical formula for hydrocarbon Z? A C2H2 B C2H4 C C2H6 D C7H16 petroleum gases naphtha X Y Z

9 20 The structures of some organic molecules are shown. Which structures represent an alkane with four carbon atoms? A 1 and 3 B 2 and 3 C 2 and 4 D 3 and 4 END OF PAPER

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