What is the reagent used and appropriate temperature required to prepare ethene from ethyl alcohol?
A, B, C and D summarize the properties of sulphuric acid depending on whether it is dilute or concentrated. Choose the property (A, B, C or D), depending on which is relevant to each of the preparations (i) to (iii): A. Dilute acid (typical acid properties) B. Non-volatile acid C. Oxidizing agent D. Dehydrating agent (i) Preparation of hydrogen chloride. (ii) Preparation of ethene from ethanol. (iii) Preparation of copper sulphate from copper oxide.