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One molecule of phenylmethanol (benzyl alcohol) can be oxidised to one molecule of benzoic acid by potassium manganate(VII) in basic conditions as shown in the reaction scheme below.
(2015)
The quality of water samples from swimming-pools A, B, C and D was assessed. The results of the tests carried out are summarised in the table.
How many (i) electrons, (ii) neutrons, has the aluminium ion, Al3+?
During the 1870s Crookes investigated cathode rays using vacuum tubes like that shown below.
Each fraction separated in the refining of crude oil is a mixture of hydrocarbons. Identify a property of a hydrocarbon that results in its presence in a particular fraction.
