Which of these fuels not a Hydrocarbon?
hydrogen, as hydrocarbon include both ‘C’ and ‘H’ .
The reaction given below is used to produce polythene. This is an example of _______ reaction
Monomer units combine to form polymers.
The addition of HBr to 1-butene gives a mixture of products A, B and C. The mixture consists of
A and B both involve secondary carbocation but C involve primary carbocation.
The synthesis of 3-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne. The bromoalkane and alkyne respectively are
BrCH2CH2CH2CH3and CH3CH2C ≡ CH
Phenyl magnesium bromide reacts with methanol to give
Phenyl magnesium bromide reacts with methanol to give a mixture of benzene and Mg(OMe)Br , grignard reaction.
Saturated Hydrocarbons contain
The number of position isomers of C5H8 is
n-pentyne, 3-methyl butyne, pent-2-yne
Which of the following will not show geometrical isomerism?
As three groups are same.
One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is
2-butene on ozonolysis give two molecules of acetone
A gas decolourised by KMnO4 solution but gives no precipitate with ammoniacal cuprous chloride is
Ethene due to unsaturation decolourise KMnO4 . But do not give precipitate with ammonical cuprous chloride.
in cycloalkanes carbon atoms form
a ring or closed chain.
Thus ethyne molecule consists of
Ethyne molecule consists of one C–C σ bond, two C–H σ bonds and two C–C π bonds.
Arrange the following hydrogen halides in order of their decreasing reactivity with propene.
Due to weak bonding between hydrogen and iodine, due to large size of iodine.
n-propyl bromide on treating with alcoholic KOH produces
Elimination reaction takes place.
What would be the product formed when 1-Bromo-3-chlorocyclobutane reacts with two equivalents of metallic sodium in ether?
Inta-molecular wurtz reaction.
Which of these is not a characteristic of aromatic Hydrocarbons?
aromatic hydrocarbon are not open chained. They are ring structures.
In the preparation of alkynes from vicinal dihalides, the reaction is
Twice the elimination reaction takes place, to form alkynes from vicinal dihalides.
Arrange the following carbanions in order of their decreasing stability.
(A) H3C – C ≡≡C–
(B) H – C ≡ C–
‘sp’ hybridized, more ‘s character’ more stable ‘-’ charge.
The angle strain in cyclobutane is
The angle strain in cyclobutane is 9°44′
2 methylbutane on reacting with bromine in the presence of sunlight gives mainly
Free radical mechanism.
The number of chain isomers of C5H12 is
2-methylbutane, 3-methylbutane, n-pentane.
Majority of the reactions of alkynes are the examples of
as alkynes are electron rich species.
Arrange the following alkyl halides in decreasing order of the rate of β−−β−− elimination reaction with alcoholic KOH
More substituted alkene is preferred by satzeff rule.
In the following sequence of reactions, the alkene affords the compound 'B'
The compound B is
Oxidative ozonolysis leads to formation of aldehyde.
Alkyl halides react with dialkyl copper reagents to give
Alkyl halides react with dialkyl copper reagents to give alkanes .Reduction reaction.