Ideally, you should study all the examples, intext questions and exercise questions (about 100), but if you are short of time, you should atleast study properties of hydrides of Group 15, difference between white ans red phosphorus, reaction of white phosphorus and Naoh, Reaction of PCl3 and PCl5 with water, Oxoacids of phosphorus and sulphur, Bleaching action of SO2 and Cl2, Anomalous properties of fluorine, preparation and few other reactions of Xenon compounds.
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