IISER Chemistry - Types of Bond Fission, Nature of reagents and preparation
Exam Duration: 45 Mins Total Questions : 30
A mixture of butane,ethylene and dimethyl acetylene is passed through acidified permanganate solution.The gas that comes out is
- (a)
butane
- (b)
dimethyl acetylene
- (c)
a mixture of butane and ethylene
- (d)
a mixture of all compounds
Position of double bond in an organic compound can be ascertained by
- (a)
treating with ammoniacal \({ Cu }_{ 2 }{ Cl }_{ 2 }\)
- (b)
treating with ammoniacal \({ AgNo }_{ 3 }\)
- (c)
teating with mercurous salt in presence of dil acids.
- (d)
ozonolysis
In pure form methane is prepared by
- (a)
Wurtz reaction
- (b)
Reaction Al4C3 with water
- (c)
Kolbe's electrolytic method using CH3COONa
- (d)
heating sodium formate with soda lime
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
In CH3CH2OH, the bond that undergoes hetrolytic clevage most readily is
- (a)
C-C
- (b)
C-O
- (c)
C-H
- (d)
O-H
Which of the following is not an electrophile?
- (a)
BF3
- (b)
Hg2+
- (c)
AlCl3
- (d)
NH3
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
Which of the following is the most stable alkene ?
- (a)
R2C=CR2
- (b)
R2C=CH2
- (c)
RCH=CHR
- (d)
CH2=CH2
Which of the following has -ve inductive effect?
- (a)
-CH3
- (b)
-CHR2
- (c)
-COO-
- (d)
-COOH
What is the product formed when acetylene reacts with hypochlorous acid.
- (a)
CH3COCL
- (b)
CLCH2CHO
- (c)
CL2CHCHO
- (d)
CLCHCOOH
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
By the hydration of propene with dil.H2SO4,the product formed would be
- (a)
isopropyl alcohol
- (b)
propyl alcohol
- (c)
ethyl alcohol
- (d)
isobulyl alcohol
Which of the following has acidic hydrogen?
- (a)
ethyne
- (b)
ethene
- (c)
benzene
- (d)
ethane
Highest b.p is expected for
- (a)
iso-octane
- (b)
n-octane
- (c)
2,2,3,3.tetramethyl butane
- (d)
n-butane
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
Acetylene on oxidation with chromic acid gives
- (a)
formaldehyde
- (b)
oxalic acid
- (c)
formic acid
- (d)
acetic acid
Ethylene and acetylene can be distinguished by using
- (a)
Tollens reagent
- (b)
Baeyers reagent
- (c)
Schiffs reagent
- (d)
bromine water
Sodium acetate on electrolysis gives
- (a)
methane
- (b)
ethane
- (c)
propane
- (d)
none of these
Ethane can be manufactured by the sodalime distillation of
- (a)
lactic acid
- (b)
succinic acid
- (c)
butanoic acid
- (d)
propanoic acid
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
The compound which exhibits optical isomerism is
- (a)
\(CH_3CHOHCH_3\)
- (b)
\(CH_{ 3 }\\ \quad \quad \quad \diagdown \\ \quad \quad \quad \quad \quad CHCH_{ 2 }C{ H }_{ 3 }\\ \quad \quad \quad \diagup \\ \quad { CH }_{ 3 }\)
- (c)
\(CH_3CHCl-CH_2CH_3\)
- (d)
\(CH_3-CCl_2-CH_2CH_3\)
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)
\(CH_3^+\)
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
1654060945.png)
1654060942.png)
1653987551.png)
1653987086.png)
1582095229.jpg)
