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JEE Main Mock Test Series 2020 & Previous Year Papers

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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:
 Notes | EduRev

Question 2: The reactions of Pwith 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
Solution:
PCl5 + SO→ POCl+ SOCl2
PCl+ H2O → POCl3 + 2HCl
PCl5 + H2SO→ POCl3 + SOCl2 + 2HCl
6PCl+ P4O10 →10 POCl3

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