Chemistry - Types of Bond Fission Nature of Reagents and Preparation
Exam Duration: 45 Mins Total Questions : 30
The number of dibromo derivatives of propane are:
- (a)
5
- (b)
4
- (c)
3
- (d)
2
Anti-Markownikoffs rule cannot be demonstrated by
- (a)
CH3CH=CH.CH3
- (b)
CH3CH2CH=CH2
- (c)
CH3CH=CH2
- (d)
CH3CH2CH2CH=CH2
How many structural isomers are possible for C2H4Br2?
- (a)
4
- (b)
3
- (c)
2
- (d)
1
How many isomers are possible for the compounds having molecular formula C3H5Br3?
- (a)
5
- (b)
4
- (c)
6
- (d)
8
the general formula for cyclo-alkanes is?
- (a)
CnH2 n+1
- (b)
CnH2n
- (c)
CnH2n-2
- (d)
CnHn
Which one of the following is most stable?
- (a)
\({ CH }_{ 3 }\overset { + }{ { CH }_{ 2 } } \)
- (b)
\({ { (CH }_{ 3 }) }_{ 2 }\overset { + }{ { CH } } \)
- (c)
\({ { (CH }_{ 3 }) }_{ 3 }\overset { + }{ C } \)
- (d)
\(C_6H_5\overset {+}{C}H_2\)
Which of the following is not a nucleophilic reagent?
- (a)
RMgBr
- (b)
LiALH4
- (c)
>0:
- (d)
H2O2
Which one of the following is not an electrophilic reagent?
- (a)
\(\ge N:\)
- (b)
H2O2
- (c)
O2
- (d)
Br2
Which of the following compounds will not react with HBr?
- (a)
C2H4
- (b)
C2H6
- (c)
C2H2
- (d)
C2H5OH
In the chlorination of benzene,the chlorating agent is
- (a)
Cl2
- (b)
Cl-
- (c)
Cl+
- (d)
HCl
A gas X decolourises bromine water and Bayer's reagent.It burns with sooty-flame.On reaction with HBr,it produces vinly bromide.The gas would be
- (a)
C2H4
- (b)
C2H6
- (c)
C2H2
- (d)
C6H6
A carbonium ion or carbocation contains a
- (a)
positively charged carbon centre
- (b)
negatively charged carbon centre
- (c)
carbon with odd electron on it
- (d)
None of the above
In which of the following species is the underlined carbon having sp3 hybridisation?
- (a)
\({ CH }_{ 3 }\underset { - }{ C } OOH\)
- (b)
\({ CH }_{ 3 }\underset { - }{ C } { H }_{ 2 }OH\)
- (c)
\({ CH }_{ 3 }\underset { - }{ C } O{ H }_{ 3 }\)
- (d)
\({ CH }_{ 2 }\underset { - }{ =CH- } C{ H }_{ 3 }\)
Racemic mixture is formed by mixing two
- (a)
isomeric compounds
- (b)
chiral compounds
- (c)
meso compounds
- (d)
optical isomers
The reaction\({ CH }_{ 3 }-CH={ CH }_{ 2 }+HBr\rightarrow { CH }_{ 3 }{ CHBrCH }_{ 3 }\) is an example of
- (a)
free radical addition
- (b)
electrophilic substitution
- (c)
electrophilic addition
- (d)
nucleophilic addition
The product formed when butyne-1 reacts with excess of hydrogen bromide in absence of H2O2 would be
- (a)
2 bromobutane
- (b)
2 ,2dibromobutane
- (c)
1,2 dibromobutane
- (d)
1,1,2,2 tetrabromobutane
which one of the following is a free radical?
- (a)
FeCl3
- (b)
Cl
- (c)
Cl
- (d)
Cl-
Addition of halogen acid is easiest in
- (a)
CH2=CH2
- (b)
CH2=CHCl
- (c)
CH3-CH=CH2
- (d)
(CH3)2C=CH2
Highest b.p is expected for
- (a)
iso-octane
- (b)
n-octane
- (c)
2,2,3,3.tetramethyl butane
- (d)
n-butane
By wurtz reaction, a mixture of methyl iodide and ethyl iodide gives
- (a)
propane
- (b)
ethane
- (c)
butane
- (d)
a mixture of the above three
An electrophilic molecule is
- (a)
BF3
- (b)
NH3
- (c)
H2O
- (d)
ROH
Boiling point of a compound does not depend on the
- (a)
polarity of its molecules
- (b)
hydrogen bonding in the compound
- (c)
size of molecule
- (d)
solubility of the compound in water
Which one of the following compounds will have lowest b.p?
- (a)
CH3Cl
- (b)
CH3F
- (c)
CH3NH2
- (d)
CH3OCH3
Which one of the following will not act as an electrophile or a nucleophile?
- (a)
H+
- (b)
NO2+
- (c)
CH4
- (d)
H2O
Which compound yields only one mono-bromo-substitution product?
- (a)
butane
- (b)
2,2 dimethyl propane
- (c)
2-methyl propane
- (d)
propane
An example of an electrophilic substitution is
- (a)
chlorination of methane
- (b)
dehydration of ethanol
- (c)
nitration of benzene
- (d)
polymerisation of ethylene
How many mono derivatives will br formed when
\({ 1 }^{ 0 }\quad \quad \quad { 3 }^{ 0 }\quad \quad { 2 }^{ 0 }\quad \quad { 1 }^{ 0 }\quad \\ { CH }_{ 3 }-{ CH }.{ CH }_{ 2 }-{ CH }_{ 3 }\\ \quad \quad \quad \quad \quad \parallel \\ \quad \quad \quad \quad \quad { CH }_{ 3\\ } \) (isopentane)
is reacted with bromine?
- (a)
1
- (b)
2
- (c)
3
- (d)
4
Which of the following is most stable ion?
- (a)
\({ CH }_{ 3 }-{ CH }_{ 2 }-\overset { + }{ C } H{ CH }_{ 3 }\)
- (b)
\({ CH }_{ 3 }-\overset { + }{ C } -{ CH }_{ 3 }\\ \quad \quad \quad \quad \quad |\\ \quad \quad \quad \quad \quad { CH }_{ 3 }\)
- (c)
\(CH_3-CH_2-CH_2-CH_2^+\)
- (d)
\(CH_3^+\)
Which one of the following is an example of metamorphism?
- (a)
\(CH_3NHC_3H_7\) and \(CH_3NHCH(CH_3)_2\)
- (b)
\(CH_3O(CH_2)_2CH_3\) and \(CH_3O.CH(CH_3)_2\)
- (c)
\(CH_3O-C_3H_7\) and \( C_2H_5-OC_2H_5\)
- (d)
\(\quad \quad \quad \quad \quad \quad \quad \quad O\\ \quad \quad \quad \quad \quad \quad \quad //\\ R-{ CH }_{ 2 }-N=\\\quad \quad \quad \quad \quad \quad \quad \searrow \) and \( \quad \quad \quad \quad \quad \quad \quad OH\\\ \ \quad \quad \quad \quad \quad \quad //\\ R-{ CH }-N=\\ \quad \quad \quad \quad \quad \quad\ \searrow \\\quad \quad \quad \quad \quad \quad \quad \quad O\)
The reaction
\(\quad \quad \quad \quad \quad \quad\quad \quad \quad { CH }_{ 3 }\quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad\quad { CH }_{ 3 }\quad \quad \quad \quad OH\\ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \diagdown \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \diagdown \quad \quad \diagup \\ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad C=O+HCN\rightarrow \quad \quad \quad \quad \quad \quad C\\ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \diagup \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \diagup \quad \quad \diagdown \\ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad H\quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad H\quad \quad \quad \quad \quad CN\)
is an example of
- (a)
free radical reaction
- (b)
electrophilic substitution
- (c)
nucleophilic substitution
- (d)
nucleophilic addition