The number of dihalogen derivatives of propane is/are-
1
2
3
4
PCl5 reacts with propanone, to give:
gem dichloride
vic dichloride
propanal
propane chloride
A compound that does not undergo SN1 reaction with OH- is -
CH2=CH-CH2Cl
(CH3)3CCl
In the following reaction
C6H5CH2Br →2. H3O+1. Mg, EtherX,
The product 'X' is -
C6H5CH2OH
C6H5CH3
C6H5CH2CH2C6H5
C6H5CH2OCH2C6H5
(a) CH3CH2OH
(b) CH3COCH3
(c)
(d) CH3OH
Iodoform reaction is given by -
Only (b)
(a), (b) and (c)
(a) and (b)
(a), (c) and (d)
Which of the following compounds undergoes nucleophilic substitution reaction most easily ?
Consider the reactions :
i. CH32CH-CH2Br→C2H5OH
CH32CH-CH2OC2H5+HBr
ii. CH32CH-CH2Br→C2H5O-
CH32CH-CH2OC2H5+Br-
The mechanisms of reactions (i) and (ii) are respectively :
The –OH group of an alcohol or the carboxylic acid can be replaced by – Cl using :
Hypochlorous acid
Chlorine
Hydrochloric acid
Phosphorous pentachloride
Chloropicrin is obtained by the reaction of :
Nitric acid on chlorobenzene.
Chlorine on picric acid.
Nitric acid on chloroform.
Steam on carbon tetrachloride.
CH3CH2Cl→NaCNX→Ni/H2Y→Acetic anhydrideZ
Z in the above reaction sequence is :-
CH3CH2CH2NHCOCH3
CH3CH2CH2NH2
CH3CH2CH2CONHCH3
CH3CH2CH2CONHCOCH3
When CH3CH2CHCl2 is treated with NaNH2, the product formed is : -
obtained by chlorination of n-butane, will be : -
An organic compound A(C4H9Cl) on reaction with Na/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative then, A is : -
Wurtz reaction is not preferred for the preparation of alkanes containing an odd number of carbon atoms
because -
Boiling points of alkanes obtained in the mixture are very close
Melting points of alkanes obtained in the mixture are very close
Lattice energy of alkanes obtained in the mixture are very close
None of the above
The correct order of increasing dipole moment is -
A hydrocarbon C5H10 does not react with chlorine in dark but gives a single monochloro compound C5H9Cl in bright sunlight. Hydrocarbon could be -
Benzene
Cyclopentane
Toluene
Hexane
Ambident nucleophiles are -
Nucleophiles having equal atomic weight
Nucleophiles having only five electrons
Nucleophiles having two nucleophilic sites
Nucleophiles having two electrophilic sites
Compounds that react faster in SN2 reaction with OH - from each given pair respectively are - a. CH3Br or CH3I b. (CH3)3CCl or CH3Cl
Out of C6H5CH2Cl and C6H5CHClC6H5,
the one that gets easily hydrolyzed by aqueous KOH is -
C6H5CHClC6H5
C6H5CH2Cl
Both react equally
p-Dichlorobenzene has a higher melting point than those of o- and m-isomers because -
More energy is required to break the crystal lattice of m-dichlorobenzene
More energy is required to break the crystal lattice of p-dichlorobenzene
More energy is required to break the crystal lattice of o-dichlorobenzene
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. Compound (A) is -
2-Methylpropene
Isobutyl bromide
2,5-Dimethylhexane
2-Bromo-2-methylpropane
The substrate used for the preparation of 1-iodobutane from HI in the presence of ZnCl2 is -
1-Butanol
Butane
Butyne
Butanal
The best substrate for the preparation of 1-iodobutane in the presence of NaI / dry acetone is -
The substrate used for the preparation of 1-Bromobutane in the presence of peroxide is-
But-1-ene
The Correct IUPAC name of the above structure is-
2-Chloro-3-methylbutane
3-Chloro-2-methylbutane
2-Chloro-1-methylbutane
3-Chloro-1-methylbutane
IUPAC name of major product upon dehydrohalogenation of 1-bromo-1-methylcyclohexane with sodium ethoxide in ethanol is -
Methylenecyclohexane
4-Methylcyclohex-1-ene
1-Methylcyclohex-1-ene
Dehydrohalogenation of 2-Chloro-2-methyl butane with sodium ethoxide
in ethanol produces a major product. IUPAC name of the product is -
2-Methyl-2-butene
2-Methyl-1-butene
1-Methyl-2-butene
Methyl butene
IUPAC name of major the product upon dehydrohalogenation of 2,2,3-Trimethyl-3-bromopentane with sodium ethoxide in ethanol is -
2,2,3-Trimethyl-3-bromopentene
3,4,4-Trimethylpent-2-ene
3,4,4-Trimethylpent-3-ene
(CH3)3CCH2CH(Br)C6H5 is -
Secondary benzyl halide
Secondary alkyl halide
Primary alkyl halide
Secondary allyl halide
CH3CH2CH(CH3)CH(C2H5)Cl, is -
Please disable the adBlock and continue. Thank you.