C: fertiliser
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Which of these processes can be used to purify water containing insoluble impurities? 1 chlorination, 2 desalination,…
What is not essential for photosynthesis?
Choose from the following gases to answer the questions below. CCIF3 CH4 CO CO2 H2 N2 NH3 O2 SO2 Each gas can be used…
Concentrated aqueous sodium chloride is electrolysed using inert electrodes. Which statement about this electrolysis …
The diagram shows the energy profile of a chemical reaction. Two energy changes are labelled X and Y. Which statement…
In the graph, curve 1 was obtained by observing the decomposition of 100 cm³ of 1.0 mol/dm³ hydrogen peroxide solutio…