2022 RSS Chem Prelims P2 SectA

1 Riverside Secondary School 6092/02/4E/PRELIM/2022 [Turn over NAME: NO: CLASS: RIVERSIDE SECONDARY SCHOOL PRELIMINARY EXAMINATION 2022 SUBJECT : Chemistry CODE/PAPER : 6092/02 LEVEL/STREAM : 4 Express DURATION : 1 hour 45 minutes READ THESE INSTRUCTIONS FIRST Write your name, index number and class in the spaces provided in the question paper. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Section A Answer all questions in the spaces provided. Section B Answer all three questions, the last question is in the form either/or. Answer all questions in the spaces provided. The number of marks is given in brackets [ ] at the end of each question or part question. A copy of the Periodic Table is printed on page 23. The use of an approved scientific calculator is expected, where appropriate. ________________________________________________________________________ This document consists of 23 printed pages.

2 Riverside Secondary School 6092/02/4E/PRELIM/2022 [Turn over Section A Answer all questions in this section in the spaces provided. The total mark for this section is 50. A1 (a) Choose from the following list of aqueous ions to answer the questions below. ammonium carbonate copper(II) hydrogen hydroxide iodide iron(II) nitrate Choose one ion from the list above which (i) is responsible for alkaline properties in a solution, ……………………………………………………………………….……………….…….…….[1] (ii) forms a green precipitate when added to aqueous sodium hydroxide, ………………………………………………………………………….……………………..….[1] (iii) forms a gas when added to acids, …………………………………………………………………………….…………………..….[1] (iv) forms a gas when added to alkalis, ………………………………………………………………………….………………..……….[1] (v) forms a reddish-brown deposit when magnesium is added. …………………………………………………………………………….………………..…….[1]

3 Riverside Secondary School 6092/02/4E/PRELIM/2022 [Turn over (b) Which statements about the separation of mixtures are true and which are false? Put a tick (🗸) in one box in each row. true false The separation of mixtures is a chemical process. Simple distillation allows the recovery of ethanol from water. In chromatography, the same substance has different Rf values in different solvents. [2] [Total: 7]

4 Riverside Secondary School 6092/02/4E/PRELIM/2022 [Turn over A2 Fig. 2.1 shows the structure of an