12.1. Nitrogen and sulfur
A subsection of Chemistry, 9701, through 12. Nitrogen and sulfur
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Nitrogen, which makes up about 80% of the Earth’s atmosphere, is very unreactive. Explain the lack of reactivity of nitrogen. Nitrogen does, however, undergo some reactions. Write an equation for one reaction of nitrogen, stating the conditions under which it occurs. equation conditions Suggest why nitrogen does react in the example you have chosen. Ammonium nitrate, NH4NO3, is a commercially important compound of nitrogen. State one large-scale use of ammonium nitrate. What are the environmental consequences of the uncontrolled use of ammonium nitrate? When solid ammonium nitrate is heated with solid sodium hydroxide in a test-tube, three products are formed. A colourless alkaline gas, Y, is given off, and a colourless liquid can be seen on the cooler parts of the test-tube. A white solid remains in the tube. Identify gas Y. Write an equation, with state symbols, for the reaction of ammonium nitrate with sodium hydroxide. In order to produce gas Y in a pure state in the laboratory, it must be passed through a drying agent. Why is concentrated sulphuric acid not suitable for drying gas Y? [T
9701_w05_qp_2
THEORY
2005
Paper 2, Variant 0
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