Edexcel Jun 2017 Paper 1 Q15

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14 The reaction between hydrogen and fluorine is highly exothermic. This is mainly because the A FF bond is weak and the HF bond is strong. B FF bond is strong and the HF bond is weak. C FF bond is weak and the HF and HH bonds are strong. D FF bond is strong and the HF and HH bonds are weak. A E R A S I H T N I E T I R W T O N O D A E R A S I H T N I E T I R W T O N O D A E R A S I H T N I E T I R W T O N O D 15 An aqueous solution of copper(II) chromate(VI) was electrolysed in the apparatus shown in the diagram using platinum electrodes. (Total for Question 14 = 1 mark) 6V dc After five minutes, the colours observed in the different parts of the solution in the U-tube were green yellow blue yellow yellow blue green green blue green yellow blue (Total for Question 15 = 1 mark) *P53491A0932* Turn over<br />

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