6 (B410U10-1) Examiner only 10. Using ideas that you have studied in your Chemistry course comment on and explain the following observations. (a) In sodium chloride and caesium chloride the arrangements of the particles in the solids are different. [4] (b) Hydrogen sulfide, H2S, is a gas at room temperature and pressure but water, H2O, is a liquid under the same conditions. [4] © WJEC CBAC Ltd. (B410U10-1) Turn over. B 410 U101 07 7 Examiner only (c) The bond angles in the PCl4 + ion are greater than the bond angles in the PCl6 − ion. [4] © WJEC CBAC Ltd. 12
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This question is part of the UK A-Level Chemistry syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.
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