RVHS Prelim _H2_Chemistry_P1_QP

River Valley High School 9729/01/PRELIMS/25 2025 Preliminary Examination [Turn over RIVER VALLEY HIGH SCHOOL JC 2 PRELIMINARY EXAMINATION CANDIDATE NAME CLASS 2 4 J CENTRE NUMBER S INDEX NUMBER H2 CHEMISTRY 9729/01 Paper 1 Multiple Choice 25 September 2025 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 15 printed pages and 1 blank page.

2 River Valley High School 9729/01/PRELIMS/25 2025 Preliminary Examination 1 The graph below shows the variation in the third ionisation energies for the consecutive elements A to I, all with atomic numbers smaller than 20. The symbols A to I do not represent actual elements. Which of the following can be deduced from the information given? A B2+ is smaller than to C2+. B In an electric field, H+ is deflected to a smaller extent than I+. C The decrease in 3rd ionisation energy from C to D on graph is due to coloumbic repulsion. D G has noble gas electronic configuration. 2 A 50.00 cm3 of a solution of 0.300 mol dm−3 MoOx2− was reduced to Mo3+ using Zn powder. The filtrate required 45.00 cm3 of 0.200 mol dm−3 acidified KMnO4 to revert to its original form of MoOx2−. What is the value of x? A 1 B 2 C 3 D 4

3 River Valley High School 9729/01/PRELIMS/25 2025 Preliminary Examination [Turn over 3 When 20 cm 3 of a gaseous hydrocarbon was completely burnt in 120 cm³ of oxygen, there is a contraction of 50 cm³. On further treatment with aqueous potassium hydroxide, the volume decreases by 60 cm³. Which could be the formula of the organic compound? All volumes being measured at the room temperature and pressure. A C2H2 B C2H4 C C3H6 D C3H8 4 What is the order of increasing bond angle for four molecules? A BF3 < SF2 < SiF4 < BrF5 B BF3 < SiF4 < SF2 < BrF5 C BrF5 < SiF4 < SF2 < BF3 D BrF5 < SF2 < SiF4 < BF3 5 Nitrogen atoms undergo the same type of hybridisation as carbon atoms. Which species contains the shortest nitrogen-oxygen bond length? A NO2 B NO2+ C NO2− D NO3− 6 The volumes and pressures of a fixed mass of gas are investigated, at different temperatures. The results are plotted on a graph of pV again