2023 RVHS 6092 Chem Prelim P1, P2, MS

River Valley High School Pg 1 of 16 Sec 4 RVIP Chemistry End-of-Year Examination 2023 RIVER VALLEY HIGH SCHOOL SEC 4 END-OF-YEAR EXAMINATION CHEMISTRY PAPER 1 9 OCTOBER 2023 1 HOUR NAME CLASS 4 INDEX NO. READ THESE INSTRUCTIONS FIRST DO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO SO. Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number in the spaces provided. 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 correct and record your choice in soft pencil on the separate Answer Sheet provided. 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 Periodic Table is printed on page 16. The use of an approved scientific calculator is expected, where appropriate. _________________________________________________________________________ This document consists of 16 printed pages.

River Valley High School Pg 2 of 16 Sec 4 RVIP Chemistry End-of-Year Examination 2023 1 A scientist wants to collect a dry sample of an unknown gas, which turns moist blue litmus paper red. Which row shows the most suitable drying agent and collection method? drying agent collection method A calcium oxide gas syringe B concentrated sulfuric acid upward delivery C fused calcium chloride gas syringe D fused calcium chloride upward delivery 2 The diagram below shows an experimental set -up to collect the gas produced from the reaction between a metal carbonate and a dilute acid. Which row shows the reactant to be added first in the flask and the number of errors in the set-up? reactant to be added first to the flask number of errors A dilute acid 1 B metal carbonate 1 C dilute acid 2 D metal carbonate 2 dilute acid metal carbonate

River Valley High School Pg 3 of 16 Sec 4 RVIP Chemistry End-of-Year Examination 2023 3 A solution of food dyes in a soft drink was extracted for analysis by paper chromatography. Two drops of the solution were placed at the centre of the circular filter paper, labelled X, as shown in the diagram below. The filter paper was left to dry. Then, 10 drops of ethanol were slowly added to the centre of the filter paper and the chromatogram was left to develop. After some time, coloured circles were seen, as shown in the diagram below. From the results above, which of the following statements about the soft drink is true? A It contains only three different food dyes. B It contains some food dyes that are not soluble in ethanol. C It contains food dyes that are soluble in ethanol. D It is yellow in colour. X Filter paper Solvent front Orange Yellow Yellow Brown

River Valley High School Pg 4 of 16 Sec 4 RVIP Chemistry End-of-Year Examination 2023 4 Tests are carried out on a sample of solid T as shown in the diagram below. What is the identify of solid T? A zinc nitrate B aluminium sulfate C lead(II) nitrate D sodium sulfate 5 Which mixture of gases would change the colour of moist red litmus paper? Mixture 1: Ammonia and carbon monoxide Mixture 2: Oxygen and chlorine Mixture 3: Sulfur dioxide and nitrogen monoxide A 1 and 2 only B 2 and 3 only C 1 and 3 only D 1, 2 and 3 white solid T colourless solution white precipitate formed white precipitate formed, insoluble in excess NH3(aq) add water NH3(aq) HCl(aq)

River Valley High School Pg 5 of 16 Sec 4 RVIP Chemistry End-of-Year Examination 2023 6 The following shows 4 gas jars filled with different gases. The lid of each gas jar is then taken off and each gas jar is left open to the air for a few hours. Which gas jar will have most of the original gas in it at the end of the few hours? A B C D 7 4 different beakers (A, B, C and D) were filled with 100 cm 3 of 4 different liquids and left on top of a table for a fixed length of time. Which of the beakers is filled with liquid with the lowest boiling point? A B C D 80 cm3 45 cm3 98 cm3 60 cm3 SO2 lid N2 lid O2 lid NH3 lid

River Valley High School Pg 6 of 16 Sec 4 RVIP Chemistry End-of-Year Examination 2023 8 The diagram below shows the arrangement of electrons inside an atom Z. State the identity of element Z. A O B Ne C Mg D Ca 9 Four atoms and the ions they form are described in the table below. atom ion number of electrons in ion relative mass P P2+ 23 57 Q Q3+ 23 58 R R2+ 24 56 S S2+ 26 58 Which two atoms are isotopes? A P and S B P and R C Q and S D Q and R 10 Which two substances conduct electricity using mobile ions? A manganese(IV) oxide and silicon B calcium and hydrochloric acid C graphite and sodium chloride D ammonia solution and copper(II) nitrate Z

River Valley High School Pg 7 of 16 Sec 4 RVIP Chemistry End-of-Year Examination 2023 11 The diagram shows the structure of silicon carbide. Which information about silicon carbide is correct? empirical formula when strongly heated in oxygen A Si2C burns, giving a solid residue and a colourless gas B Si2C burns, giving a colourless gas only C SiC burns, giving a solid residue and a colourless gas D SiC burns, giving a colourless gas only 12 Which is the same for equal volumes of 1.00 mol dm −3 solutions of hydrochloric acid and ethanoic acid? A pH of solution B concentration in g dm−3 C electrical conductivity of solution D number of moles of sodium hydroxide required for complete neutralisation 13 The percentage by mass of iron in haemoglobin is 0.328%. The relative molecular mass of a haemoglobin molecule is 68000. How many iron atoms are there in one haemoglobin molecule? A 3 B 4 C 5 D 6 14 If there are n molecules in 10.0 g of hydrogen gas, how many molecules are there in 110 g of carbon dioxide gas? A 0.25 n B 0.5 n C 2 n D 4 n

River Valley High School Pg 8 of 16 Sec 4 RVIP Chemistry End-of-Year Examination 2023 15 Phosphorus reacts with bromine to produce phosphorus tribromide. 2P + 3Br2 → 2PBr3 What mass of phosphrous tribromide is produced when 6.55 g of phosphorus is added to 400 cm3 of 0.700 mol dm−3 bromine solution? [Mr: P , 31.0; Br, 79.9] A 50.5 g B 57.2 g C 75.8 g D 114 g 16 The following reactions are carried out. reaction result aqueous sodium hydroxide is added to ammonium carbonate gas E is given off compound F is added to water containing Universal indicator Universal indicator turns from green to red What is gas E and compound F? gas E compound F A ammonia nitrogen monoxide B ammonia nitrogen dioxide C carbon dioxide nitrogen monoxide D carbon dioxide nitrogen dioxide 17 Given a supply of dilute hydrochloric acid, aqueous sodium carbonate and aqueous lead(II) nitrate, how many different pure salts could be prepared? A 0 B 1 C 2 D 3 18 The reaction representing the Haber Process is represented by the following equation: N2 + 3H2 ⇌ 2NH3 Which of the following changes in reaction conditions in the Haber Process will decrease the activation energy of the reaction? A using iron catalyst B increasing the temperature C increasing the amount of nitrogen present D increasing the amount of ammonia present

River Valley High School Pg 9 of 16 Sec 4 RVIP Chemistry End-of-Year Examination 2023 19 An investigation was carried out to study the reaction between calcium carbonate and 50 cm3 of excess acid. Which change is not likely to result in the difference between experiments I and II? experiment I experiment II A calcium carbonate granules was used calcium carbonate powder was used B 0.100 mol dm–3 HCl was used 0.200 mol dm–