Sec 4 Science Biology SA2 2018 Bedok South QP

This document consists of 19 printed pages including this cover page. [Turn Over BEDOK SOUTH SECONDARY SCHOOL PRELIMINARY EXAMINATION 2018 4EXP CANDIDATE NAME CLASS REGISTER NUMBER SCIENCE (BIOLOGY, CHEMISTRY) Paper 1 (Biology, Chemistry) Candidates answer on the OMS. No Additional Materials are required 5078/01 6 August 2018 1 hour READ THESE INSTRUCTIONS FIRST Write your class, index number and name on the work you hand in. Write in dark blue or black ink on both sides of the paper. Do not use staples, paper clips, highlighters, glue or correction fluid. There are forty questions in this paper. Answer all questions. For each question there are four possible answers A, B, C, and D. Choose the one you consider to be correct and record your choice in soft pencil on the OMS. 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. A copy of the Data Sheet is printed on page 18. A copy of the Periodic Table is printed on page 19. Setter: Ms. C ynthia Chong and Ms. Denise Wong www.KiasuExamPaper.com 32

2 [Turn Over 1 The diagram shows some laboratory apparatus. Which apparatus are needed to produce and collect pure water from seawater? A 2 and 5 B 3 and 5 C 1, 2 and 4 D 1, 4 and 5 2 Which substance, A to D undergoes changes in physical states from room temperature to 0oC? Melting point/oC Boiling point / oC A -2 65 B -23 4 C 50 250 D -187 -165 3 Which statements are true about compounds? 1 They can be made from another compound. 2 They can be made from metals alone. 3 They can be made from non-metals alone. 4 They can be made from a metal and a non-metal. A 1, 2 and 3 B 1, 2 and 4 C 1, 3 and 4 D 2, 3 and 4 www.KiasuExamPaper.com 33

3 [Turn Over 4 A sugar mixture was compared with four different simple sugars using chromatography. The results are shown in the diagram below. Wha t types of sugars does the mixture contain? A sugar 1 and 2 B sugar 1 and 4 C sugar 2 and 3 D sugar 3 and 4 5 Which compound contains three atoms? A H2O B HCl C CaSO4 D NO 6 Which of the following compounds has the highest percentage of nitrogen by mass? A NH4NO3 B (NH4)2CO3 C CO(NH2)2 D NH4Cl 7 A student dissolved 14.9g of potassium chloride, KCl, in 100 cm3 of water. What is the concentration of the resulting potassium chloride solution in mol/dm3? A 0.002 mol/dm3 B 0.01 mol/dm3 C 0.15 mol/dm3 D 2.0 mol/dm3 sugar mixture sugar 1 sugar 2 sugar 3 sugar 4 www.KiasuExamPaper.com 34

4 [Turn Over 8 The graph below shows the colour ranges of the acid-base indica tors methyl orange, bromothymol and phenolphthalein. A solution, when placed in the three indicators separately, is yellow in methyl orange, yellow in bromothymol and colourless in phenolphthalein . What is the pH range of the solution? A 2.5 to 3.5 B 4.5 to 5.5 C 7.5 to 8.5 D 9.5 to 10.5 9 Which of the following elements burns in air to produce a subst a n c e w h i ch c an react with both hydrochloric acid and sodium hydroxide? A lead B hydrogen C iron D phosphorous 10 Which of the following reagents cannot be used to differentiate sodium hydroxide solution from sodium chloride solution? A Aqueous iron(III) nitrate B Aqueous copper(II) nitrate C Aqueous lithium nitrate D Aqueous ammonium nitrate www.KiasuExamPaper.com 35

5 [Turn Over 11 Separate samples of hydrogen per oxide are added to aqueous pota ssium iodide and to acidified potassium manganate( VII). It is known that hydrogen peroxide is both an oxidising agent and a reducing agent. What colour changes are seen? aqueous potassium iodide acid ified potassium manganate(VII) A colourless to brown purple to colourless B brown to colourless purple to colourless C colourless to brown orange to green D brown to colourless orange to green 12 X, Y and Z are elements in the same period of the Periodic Table. X forms an acidic oxide, Y forms a basic oxide and Z forms an amphoteric oxide. If X, Y and Z are placed in increasing order of atomic number (lowest atomic number first), which order is correct? A X , Y, ZB Y, Z, X C Y , X, ZD X, Z, Y 13 Rubidium is in the same group as sodium in the Periodic Table. What is a likely property of rubidium? A It reacts with water to form hydrogen gas. B It cannot be cut by knife. C It reacts with chlorine gas to form a salt with the formula RbCl2. D It does not conduct electricity in the molten state. www.KiasuExamPaper.com 36

6 [Turn Over 14 Which of the following experiment will have the fastest speed of reaction? 15 The element chromium produces hydrogen from dilute hydrochloric acid but it does not react with cold water. W hen a piece of chromium is pla ced in lead( II) nitrate solution, solid of lead appear. What is the order of decreasing reactivity of the metals lead, calcium and chromium? A calcium, chromium, lead B calcium, lead, chromium C chromium, calcium, lead D lead, chromium, calcium 16 In which tube is the iron nail not likely to rust? boiled water drying age nt salt water AB C D www.KiasuExamPaper.com 37

7 [Turn Over 17 Which of the following shows the correct percentage composition of oxygen, nitrogen and carbon dioxide found in dry unpolluted air? Oxygen Nitrogen Carbon dioxide A 78 21 1 B 1 78 21 C 21 78 1 D 78 21 78 18 Which of the following shows the correct use of the different fractions of petroleum? Fraction Uses A Petrol used for making chemical feedstock B Bitumen used for lubricating machine parts C Kerosene used as fuel for aircraft D naphtha used to pave road 19 Which of the following hydrocarbon undergoes substitution reaction? A C2H4 B C2H6 C C2H5COOH D C2H5OH 20 Which of the following is the same for both ethanol and ethanoic acid? A empirical formula B functional group C number of carbon D homologous series www.KiasuExamPaper.com 38

8 [Turn Over 21 The table below shows comparisons of features between a red blood cell and xylem vessel cell. feature red blood cell xylem vessel cell 1 cytoplasm present no no 2 cell wall present yes yes 3 nucleus present no no 4 chloroplast present no yes Which comparison of features is / are correct? A1 only B3 only C2 and 4 only D3 and 4 only 22 The diagram below shows red blood cells in four different salt solutions, P, Q, R and S. Which correctly shows the solutions in order of increasing salt concentration? lowest highest A QP S R B QS P R C RP S Q D RS P Q www.KiasuExamPaper.com 39

9 [Turn Over 23 Which substance does not contain the element nitrogen? A urea B pepsin C cellulase D glycogen 24 Which fluid(s) collected from an individual is likely to give a brick-red precipitate when tested with Benedict’s solution? 1 blood 2 saliva 3 secretions from the pancreas 4 secretions from the walls of the large intestine A1 only B1 and 3 only C2 and 4 only D1 , 3 and 4 only 25 Digestive juices were collected from three regions of the human alimentary canal. Drops of these digestive juices were added to three wells made in an agar of starch. After an hour, the wells were rinsed with distilled water and flooded wi th iodine solution. The results are shown below. re gion around well 1 2 3 colour of iodine solution yellowish-brown blue-bl ack yellowish-brown Which correctly identifies the regions of the alimentary canal that the three digestive juices were obtained from? 123 A mouth small intestine stomach B mouth stomach small intestine C stomach mouth small intestine D small intestine mouth stomach www.KiasuExamPaper.com 40

10 [Turn Over 26 The diagram below represents some human organs and their associated blood vessels. Which statement about the concentration of alcohol in the blood vessels P and Q after a man has consumed an alcoholic drink is true? A There is no alcohol in both blood vessels. B The concentration of alcohol is higher in P than Q. C The concentration of alcohol is lower in P than Q. D The concentration of alcohol is equal in both blood vessels. 27 The