JEE NEET Mock Test Series for Chemistry - Organic Chemistry
Mock Test Series
Que 1
In which of the following compounds the marked carbon is expected to have great positive charge?
a) 'CH3-----CH2----Cl
b) 'CH3---CH2---MgCl
c) 'CH3---CH2---Br
d) 'CH3--- CH2----CH3
Ans (a)
Que 2
The principle involved in paper chromatography is
a) Adsorption
b) Partition
c) Solubility
d) Volatility
Ans ( b)
Que 3
The IUPAC name for
a) 1- hydroxy pentane -1,4-dione
b) 1,4-dioxopentanol
c) 1-carboxybutan-3-one
d) 4- oxopentanoic acid
Ans (d)
Que 4
Covalent bond can undergo fission in two different ways the correct representation involving a heterolytic fission of CH3--Br is
Ans. (b)
Que 5
What is the correct order of decreasing stability of following cations
Ans ( a)
Que 6
The species having +I effect are
(a) CH3CH2
(b) ---COOH
(c) ---NO2
(d) (CH3)3C----
Ans (a,c)
Que 7
The number of structural isomers for. C6H14 is
a) 3
b) 4
c) 5
d) 6
Ans ( c)
Que 8
Hyperconjugation involves overlap of the following orbitals
a) sigma-sigma
b) sigma - p orbital
c) p orbital-p orbital
d) π--π
Ans (b)
Que 9
Which of the following compounds will exhibit geometrical isomerism
a) 1-Phenyl -2-butene
b) 3-Phenyl-1-butene
c) 2-Phenyl-1-butene
d) 1,1-Diphenyl-1- propene
Ans ( a)
Que 10
Which of the following has the lowest dipole moment
Ans ( b)
Que 11
Meso compounds do not show optical activity because
a) they do not contain chiral carbon atoms
b) they have non superimposable mirror images
c) they contain plane of symmetry
d) they do not contain plane of symmetry
Ans ( c )
Que 12
The number of optical isomers of the compound
a) 0
b) 1
c) 3
d) 4
Ans ( d)
Que 13
Among the following structures which one is not the resonating structure of other
a) I
b) II
c) III
d) IV
Ans (d)
Que 14
Which one is most nucleophilic nitrogen
Ans (a)
Que 15
The number of isomers including stereoisomers are possible for the compound having molecular formula C4 H8
is
a) 1
b) 2
c) 3
d) 4
Ans ( d)
Que 16
Two possible stereo structures of CH3CHOH.COOH which are optically active are called
a) Enantiomers
b) Mesomers
c) Diastereomers
d) Atropisomers
Ans. ( a)
Que 17
The number of Sigma and Pi bonds present in 1,3- butadiene are respectively
a) 9 and 2
b) 8 and 2
c) 9 and 3
d) 9 and 1
Ans ( a )
Que 18
The enolic form of ethyl acetoacetate as shown below has
a) 9 sigma and 2 pi bonds
b) 9 sigma and 1 pi bond
c) 18 sigma and 2 pi bond
d) 16 sigma and 1 pi bond
Ans (c)
Que 19
The order of stability of the following carbo cations is
a)III>I>II
b) II>I>III
c) I<II<III
d) III<II<I
Ans ( a )
Que 20
The IUPAC name of the alkane
a) Z-3 -methyl -4-propyl-3-octene
b) E-3-methyl-4-propyl-3-octene
c) E-2-butyl-3-methyl-3-heptene
d) Z-2-ethyl-3-propyl-2-heptene
Ans (a)
Que 21
Orbital interaction between Sigma bonds of a substituent group and the neighbouring Pi orbital is known as
a) Hyperconjugation
b) Inductive effect
c) Stearic effect
d) Dipole - Dipole interaction
Ans ( a)
Que 22
Name of the compound
a) 4 -Ethyl -3-methyloctane
b) 3- Methyl -4 - ethyl octane
c) 2-3-Diethylheptane
d) 5 -Ethyl -6- methyloctane
Ans (a)
Que 23
The compounds CH3OC3H7 and C2H5OC2H5 exhibit
a) optical isomerism
b) cis-trans isomerism
c) metamerism
d) chain isomerism
Ans ( c )
Que 24
The reaction is
H2O
(CH3)CBr------------ (CH3)3COH
a) elimination reaction
b) substitution reaction
c) free radical reaction
d) addition reaction
Ans (b)
Que 25
The hybrid orbitals that will form the compound
Ans (a)