2019 RVHS Prelim P1 ANS

River Valley High School 9729/01/PRELIM/19 [Turn over 2019 Prelim Examinations RIVER VALLEY HIGH SCHOOL JC2 PRELIM EXAMINATION CANDIDATE NAME CLASS 18J CENTRE NUMBER S 3 0 4 4 INDEX NUMBER H2 CHEMISTRY 9729/01 Paper 1 Multiple Choice 26 Sep 2019 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet 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 Optical Answer Sheet in the spaces provided. There are thirty 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 Optical 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. _____________________________________________________________________________ This document consists of 16 printed pages

2 River Valley High School 9729/01/PRELIM/19 2019 Prelim Examinations For each question there are four possible answers, A, B, C and D. Choose the one you consider to be correct. 1 A 50.00 cm 3 of a solution of 0.300 mol dm 3 MoOx2 was reduced to Mo 3+ using Zn powder. The filtrate required 45.00 cm 3 of 0.200 mol dm 3 acidified KMnO4 to revert back to its original form of MoOx2. What is the value of x? A 1 B 2 C 3 D 4 2 10 cm 3 of an unknown hydrocarbon was combusted in excess oxygen gas. The gaseous mixture contracted by 30 cm3. The gaseous mixture further contracted by 40 cm3 when it was passed through aqueous sodium hydroxide. All volumes of gases were measured at room temperature and pressure. 1 cyclopropane 2 butane 3 cyclobutane 4 but-2-ene What is the hydrocarbon? A 1 and 2 only B 2 and 3 only C 3 and 4 only D 2, 3 and 4

3 River Valley High School 9729/01/PRELIM/19 [Turn over 2019 Prelim Examinations 3 The successive ionisation energies, in kJ mol1, of elements X and Y are given below. X 575 1820 2740 11600 14800 18400 23400 Y 1320 3390 5320 7470 11000 13330 71330 1 The element preceding X in the Periodic Table has a higher first ionisation energy. 2 Element Y has a lower first ionisation energy than the element preceding it in the Periodic Table. 3 X and Y forms a compound with the formula X3Y2. 4 Oxide of X dissolves in water to give an acidic solution. Which statements about X and Y are true? A 1 and 2 only B 1 and 3 only C 2 and 3 only D 2 and 4 only

4 River Valley High School 9729/01/PRELIM/19 2019 Prelim Examinations 4 Use of Data Booklet is relevant to this