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Question.1 The nitrogen oxide(s) that contains (s) N-N bind (s) is (are) (IIT JEE)
a. N2O
b. N2O3
c. N2O4
d. N2O5
Answer: a, b & c
Solution:
Question.2 The reactions of P4 with X lead selectively to P4O6. The X is
a. Dry O2
b. A mixture of O2 and N2
c. Moist O2
d. O2 in the presence of aqueous NaOH
Answer: b.
Solution: P4+3O2 +N2 →P4O6
In this reaction N2 acts as diluent and retards the further oxidation.
Question. 3 Among the following compounds, the number of compounds that can react with PCl5 to give POCl3 is O2, CO2, SO2, H2O, H2SO4, P4O10.
Answer: 4
PCl5 + SO2 → POCl3 + SOCl2
PCl5 + H2O → POCl3 + 2HCl
PCl5 + H2SO4 → POCl3 + SOCl2 + 2HCl
6PCl5 + P4O10 →10 POCl3
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