EJC Prelim H2 Chemistry Paper 1 QP

© EJC [Turn Over EUNOIA JUNIOR COLLEGE JC2 Preliminary Examination 2025 General Certificate of Education Advanced Level Higher 2 CHEMISTRY Paper 1 Multiple Choice 9729/01 19 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, civics group and registration number on the Answer Sheet in the spaces provided unless this has been done for you. 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 question paper. The use of an approved scientific calculator is expected, where appropriate. This document consists of 13 printed pages and 3 blank pages.

2 © EJC 9729/01/J2PE/25 1 Three particles approach an electric field at the same speed. They are deflected as they pass through the electric field. What could be the identities of particles X, Y and Z? X Y Z A 35 17Cl– 37 17Cl– 23 11Na+ B 6 3Li+ 7 3Li+ 1 1H– C 37 17Cl– 35 17Cl– 23 11Na+ D 7 3Li+ 6 3Li+ 1 1H– 2 Which of the following about calcium and copper is correct? A The outermost orbital of the atoms of both elements has the same shape. B Atom of both elements have orbitals of only 2 different shapes of various sizes. C Atom of both elements have the same number of electrons in the outermost shell. D Both elements form ions of 2+ charge with the electronic configuration of [Ar]. + – X Y Z

3 © EJC 9729/01/J2PE/25 [Turn over 3 The following diagrams show the structures of an element, one of its oxides and its halides. What could the element be? A aluminium B carbon C phosphorus D silicon 4 The boiling point of water (100 ºC) is greater than that of HF (20 ºC). Which statement is a correct explanation of the above? A Each hydrogen bond formed between water molecules is stronger than that formed between HF molecules. B There are more atoms in a water molecule than there are in an HF molecule, resulting in stronger intermolecular forces in water. C There are, on average, more hydrogen bonds between water molecules than there are between HF molecules. D The water molecule has stronger permanent dipole –dipole interactions than the HF molecule. 5 For a fixed mass of an ideal gas, which of the following graphs does not have the same general shape as the rest? ( = density of the gas; M = molar mass of gas) A p  against T B pV against M T C p against ρT D T p against V

4 © EJC 9729/01/J2PE/25 6 Which option correctly describes the