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OCR A Level Chemistry A (H432) Chemistry B (H433)
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OCR A Level Chemistry A (H432) Chemistry B (H433)Ethanol is oxidised to ethanoic acid using acidified potassium dichromate(IV) solution. The reaction is heated under reflux using the equipment shown in the diagram below. What is the reason for heating under reflux? A. to ensure even heating B. to prevent any substances escaping C. to boil the mixture at a higher temperature D. to allow efficient mixing Your answer [1] 2. A chemist compares the rates of hydrolysis of 1-chloropropane and 1-bromopropane in ethanol. Which reagent in aqueous solution should be used? A Silver chloride B Silver nitrate C Potassium chloride D Potassium nitrate Your answer [1]
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OCR A Level Chemistry A Chemistry B
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OCR A Level Chemistry A Chemistry B
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ocr a level chemistry a h432 chemistry b h433
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