OCR A Specimen Paper 3 Q1

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Answer all the questions. 1 Give chemical explanations for the following statements. (a) Bromine has a higher boiling point than chlorine.. [1] (b) A carton of milk expands on freezing.. (c) Potassium is placed immediately after argon in the periodic table. [1] Specimen . [1] (d) The reaction of ethane with chlorine under UV radiation is a poor method for preparing a high yield of chloroethane.. (e) Water has a concentration of approximately 56 mol dm3.[1] . (f) The carboncarbon bonds in benzene are all the same length.[1] . [1]OCR 2014 H432/03<br /> (g) (i) . 4.25 g of C6H5COOCH3 contains 1.881022 molecules. [1]. (j) The rate of hydrolysis of 1-bromobutane is faster than that of 1-chlorobutane. [1]. [1] IR spectroscopy distinguishes ketones from carboxylic acids.. (h) 1.323 g of N2O(g) has a volume of 1.00 dm3 at 100 kPa and 400 K. [1]SpecimenOCR 2014 H432/03 Turn over<br />

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