Preparation of Haloalkanes from Alcohol
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The reaction of 1-Bromo-3-Chlorocyclobutane with 2 equivalents of Na in the presence of ether products:
Match the terms mentioned in Column I with the terms in Column II.
Column I | Column II | ||
A |
Carbocation |
(i) |
Cyclohexane and 1-hexene |
B |
Nucleophile |
(ii) |
Conjugation of electrons of C−H σ bond with empty p- orbital present at adjacent positively charged carbon. |
C | Hyperconjugation | (iii) |
sp2 hybridized carbon with empty p−orbital |
D |
Isomers |
(iv) |
Ethyne |
E |
sp hybridization |
(v) |
Species that can receive a pair of electrons |
F |
Electrophile |
(vi) |
Species that can supply a pair of electrons |
Which of the following halogen acids is least acidic
HBr
HI
HCl
HF
PCl3F2
PCl2F3
Decreasing order of reactivity of HX in the reaction
[RPET 2000; AIIMS 1983; MP PET 1996]
How do you count for the following observations?
(a) Though alkaline potassium permanganate and acidic potassium permanganate both are used as oxidants, yet in the manufacture of benzoic acid from toluene we use alcoholic potassium permanganate as an oxidant. Why? Write a balanced redox equation for the reaction.
(b) When concentrated sulphuric acid is added to an inorganic mixture containing chloride, we get colourless pungent smelling gas HCl, but if the mixture contains bromide then we get red vapour of bromine. Why?