Q42.Heating white phosphorus with conc. NaOH solution gives mainly (1) Na3 P and H2O (2) H3 PO and NaH (3) P(OH)3 and NaH2 PO4 (4) PH3 and NaH2 PO2
What This Question Tests
The question assesses knowledge of the specific reaction of white phosphorus with concentrated NaOH solution, which is a disproportionation reaction producing phosphine and sodium hypophosphite.
Concepts Tested
📚 NCERT Sections This Tests
7.17 — Give Equations Of The Following Reactions:
Chemistry Class 12 · Chapter 7
7.17 Give equations of the following reactions: (i) Oxidation of propan-1-ol with alkaline KMnO4 solution. (ii) Bromine in CS2 with phenol. (iii) Dilute HNO3 with phenol. (iv) Treating phenol wih chloroform in presence of aqueous NaOH.
8.17 — Complete Each Synthesis By Giving Missing Starting Material, Reagent Or Products
Chemistry Class 12 · Chapter 8
8.17 Complete each synthesis by giving missing starting material, reagent or products
6.21 — Primary Alkyl Halide C4H9Br (A) Reacted With Alcoholic Koh To Give Compound (B).
Chemistry Class 12 · Chapter 6
6.21 Primary alkyl halide C4H9Br (a) reacted with alcoholic KOH to give compound (b). Compound (b) is reacted with HBr to give (c) which is an isomer of (a). When (a) is reacted with sodium metal it gives compound (d), C8H18 which is different from the compound formed when n-butyl bromide is reacted with sodium. Give the structural formula of (a) and write the equations for all the reactions.
📋 Question Details
- Chapter
- p-block Elements
- Topic
- Chemistry of Phosphorus
- Year
- 2022
- Shift
- 27 Jun Shift 1
- Q Number
- Q42
- Type
- MCQ
- NCERT Ref
- Class 12 Chemistry Ch 7: The p-Block Elements
More from this Chapter
Q87.Which of the following oxides is amphoteric in character? (1) CaO (2) CO2 (3) SiO2 (4) SnO2
Q77.Which of the following statements is true? (1) H3PO3 is a stronger acid than H2SO3 (2) In aqueous medium HF is a stronger acid than HCl (3) HClO4 is a weaker acid than HClO3 (4) HNO3 is a stronger acid than HNO2
Q94.What products are expected from the disproportionation reaction of hypochlorous acid? (1) HClO3 and Cl2O (2) HClO2 and HClO4 (3) HCl and Cl2O (4) HCl and HClO3
Q45.The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequence (1) GeX2 ≪SiX2 ≪SnX2 ≪PbX2 (2) SiX2 ≪GeX2 ≪PbX2 ≪SnX2 (3) SiX2 ≪GeX2 ≪SnX2 ≪PbX2 (4) PbX2 ≪SnX2 ≪GeX2 ≪SiX2