Dehydrohalogenation for Alkenes
Trending Questions
Q. Consider the following reaction CH3−CH3|C|Br−CH2CH3Alc.KOH⟶
which of the following alkene will be the major product?
which of the following alkene will be the major product?
- I
- II
- both will be formed in equal amount
- None of the above
Q.
Distinguish between the saturated hydrocarbon ethane and unsaturated hydrocarbon ethene.
Q. For the given reaction :
Major product (Y) is :
Major product (Y) is :
Q. Ethyl bromide gives ethylene when reacted with
- Ethyl alcohol
- Dilute H2SO4
- Aqueous KOH
- Alcoholic KOH
Q.
A molecule of acetylene contains
one σ and two π bonds
two σ and two π bonds
three σ and two π bonds
two σ and three π bonds
Q. How many different possible alkenes are formed when 2-chlorobutane is treated with ethanolic solution of KOH?
- 1
- 2
- 3
- 4
Q. CH3−CH2−CH2−Br→CH3−CH2−CH2−CH3
The most effective reagent for the above transformation is:
The most effective reagent for the above transformation is:
- Zn/H+
- CuI
- CH3MgCl
- (CH3)2CuLi
Q.
Isobutene is the exclusive product of dehydrohalogenation (by a strong base) of
isobutyl chloride
tert-butyl bromide
both (a) and (b)
none
Q. Alkene can be prepared from alkyl halide by the following reagent R−X+N¯u→Alkene+NuH
- Alc. KOH + heat
- Aq. KOH + cold water
- NaOH
- LiOH
Q. The compound B formed in the following sequences of reactions is
CH3−CH2−CH2−Cl(a)propylchloride)Alc.KOH−−−−−−→ CH3−CH=CH2(Propeneb)
CH3−CH2−CH2−Cl(a)propylchloride)Alc.KOH−−−−−−→ CH3−CH=CH2(Propeneb)
- Propyne
- Propene
- Propanol
- Propane
Q. The major product of the following reaction:
Q.
In this reaction 'A' is
Q. Which of the following compound(s) will not undergo β- Elimination reaction on reacting with alcoholic KOH?
Q.
When 2-bromobutane reacts with alcoholic KOH, the reaction is called
Halogenation
Hydrogenation
Chlorination
Dehydro-halogenation
Q.
Alkenes could be synthesized by:
Dehydration of alcohols
Dehydrohalogenation of alkyl halides
Wittig olefination
All of the above
Q. CH3−CH2−Clalc.KOH−−−−−→A. the product is
- CH3CH2OK
- CH3CHO
- CH3CH2OCH3CH3
- CH2=CH2
Q. CH3−CH2−Clalc.KOH−−−−−→A. the product is
- CH3CH2OK
- CH3CHO
- CH3CH2OCH3CH3
- CH2=CH2
