RVHS_2023_JC2_H2_CM_Prelim_P1_QP

River Valley High School 9729/01/PRELIMS/23 2023 Preliminary Examination [Turn over RIVER VALLEY HIGH SCHOOL JC 2 PRELIMINARY EXAMINATION CANDIDATE NAME CLASS 2 2 J CENTRE NUMBER S INDEX NUMBER H2 CHEMISTRY 9729/01 Paper 1 Multiple Choice 25 September 2023 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/23 2023 Preliminary Examination

3 River Valley High School 9729/01/PRELIMS/23 2023 Preliminary Examination [Turn over 1 Why is the third ionisation energy of magnesium much higher than that of aluminium? A Aluminium has more protons than magnesium. B Magnesium has a complete octet, but aluminium does not. C The ionic radius of Al2+ ion is larger than that of Mg2+ ion. D The electron to be removed from magnesium is closer to the nucleus. 2 When a beam of protons is passed through an electric field, the angle of deflection towards the negatively-charged plate is 12.0 . Which particle will undergo a deflection of 8.0  in the opposite direction? A 12C3 B 10B2 C 6Li4 D 3He 4 Which compound does not have a co-ordinate bond? A CO B CS2 C NO3  D NH4 + 3 Tritium, 3 1 H, is a radioactive isotope of hydrogen. It slowly turns into a helium isotope 3 2 He. Which statements about the two isotopes are incorrect? 1 Both isotopes have more neutrons than electrons. 2 Both isotopes have the same number of protons in their nuclei. 3 Both isotopes have the same number of charged sub-atomic particles. A 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

4 River Valley High School 9729/01/PRELIMS/23 2023 Preliminary Examination 5 Ice is the crystalline form of water. The diagram below shows part of the structure of ice. Which of the following statement is incorrect? A Ice is not a conductor of electricity. B Ice has a giant covalent structure. C The bond angle about oxygen in ice is 109.5 . D It has a lower density than water at 0 C due to its open structure. 6 A gas at a pressure of 4.5 0 atm is heated from 25 .0 C to 480 C and simultaneously compress