B: chlorination
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Which pollutant causes eutrophication in rivers?
The diagram shows a flow chart for the manufacture of fertiliser. In the flow chart, what are W, X, Y and Z?
Which ion is present in both sewage and fertilisers and can cause eutrophication when it enters rivers?
Two isotopes of chlorine are ³⁵Cl and ³⁷Cl. Using these isotopes, how many different relative molecular masses are po…
Gases can diffuse through porous pots. The diagram shows a beaker full of nitrogen inverted over a porous pot contain…
Aqueous copper(II) sulfate is electrolysed using carbon electrodes. Which observations will be made?