2021 RVHS Prelim P1 QP

River Valley High School 9729/01/PRELIMS/21 2021 Preliminary Examination [Turn over RIVER VALLEY HIGH SCHOOL JC 2 PRELIMINARY EXAMINATION CANDIDATE NAME CLASS 2 0 J CENTRE NUMBER S INDEX NUMBER H2 CHEMISTRY 9729/01 Paper 1 Multiple Choice 23 September 2021 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class, centre number and index number on the 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 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. This document consists of 14 printed pages and 2 blank pages.

2 River Valley High School 9729/01/PRELIMS/21 2021 Preliminary Examination 1 When potassium chlorate( V) KC lO3, is heated at its melting point, it disproportionates to potassium chlorate(VII) KClO4, and potassium chloride. What is the maximum number of moles of potassium chlorate( VII) which could be produced from 0.200 mol of potassium chlorate(V)? A 0.200 B 0.150 C 0.100 D 0.0500 2 Methane was burned in an incorrectly adjusted Bunsen burner. The methane was converted into a mixture of carbon dioxide and carbon monoxide in the ratio 99:1, together with water vapour. What will be the volume of oxygen consumed when y dm3 of methane is burned? A 30.01y( 2y ) dm2 B 3( 2y 0.01y ) dm C 30.01y( y ) dm2 D 3( y 0.01y ) dm 3 Use of the Data Booklet is relevant to this question. The table shows the fifth, sixth, seventh, eighth and ninth ionisation energies of three elements in the third period. Ionisation energy/ kJ mol‒1 5th 6th 7th 8th 9th Element A 6274 21267 25431 29872 35905 Element B 7004 8496 27107 31719 36621 Element D 6542 9362 11018 33604 38600 Which statements are correct? 1 The first ionisation energy of A is lower than that of B. 2 The atom of element A will be isoelectronic with D2+. 3 A and D forms an ionic solid AD3. A 1 and 3 only B 2 and 3 only C 1 only D 2 only

3 River Valley High School 9729/01/PRELIMS/21 2021 Preliminary Examination [Turn over 4 In which order are the electrons lost in forming Ga4+ ion? 1st 2nd 3rd 4th A 3d 4p 4s 4s B 3d 4s 4s 4p C 4p 4s 3d 3d D 4p 4s 4s 3d 5 Which pair of liquids, when mixed, will give out heat? A CH2Cl2 and CH3COCH2CH3 B CH2Cl2 and C6H12 C CF4 and COCl2 D CCl4 and C10H21OH 6 A 10 m 3 of oxygen gas at a pressure o