NJC H2 Chem 2013 Prelim P1 QP

1 NJC/H2 Chem/01/2013 [Turn over NATIONAL JUNIOR COLLEGE SH2 PRELIMINARY EXAM Higher 2 CANDIDATE NAME SUBJECT CLASS REGISTRATION NUMBER CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Data Booklet 9647/01 Thu 19 Sept 2013 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, subject class and registration number on the Answer Sheet in the spaces provided unless this has been done for you. There are 40 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. This paper consists of 19 printed pages and 0 blank page. 84

2 NJC/H2 Chem/01/2013 [Turn over Section A For each question there are four possible answers A, B, C, and D. Choose the one you consider to be correct. 1 Which one of the following represents the configuration of the three electrons of highest energy for the ground state of an element in group III? A 1s2 2s1 B 1s1 2s1 2p1 C 2s1 2p2 D 4s2 4p1 2 The first ionisation energies of twenty successive elements in the Periodic Table are represented in the graph. The letters given are not the normal symbols for these elements. Which statement about the elements and their compounds in this graph is not true? A Oxide and hydroxide of element M are amphoteric. B Oxide of element F has a giant covalent lattice structure. C Elements B, J and R are in Group 0 of the Periodic Table. D The second ionisation energy of K is larger than the second ionisation energy of L. first ionisation energy /kJ mol1 85

3 NJC/H2 Chem/01/2013 [Turn over 3 In an experiment, a beam of protons was passed through an electric field of constant strength. Analysis of the deflection occurring at the electric field region revealed an angle of deflection of 12° towards the negative plate. Under identical conditions, a beam of particles, Q, each having 24 times the mass of a proton, was deflected by an angle of 1o towards the positive plate. What is the overall charge on a particle of Q? A +2 B +3 C –3 D –2 4 Use of the Data Booklet is relevant to this question. A typical solid ferti