JEE Main Chemistry - Types of Bond Fission Nature of Reagents and Preparation
Exam Duration: 60 Mins Total Questions : 30
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
Which one of the following substance will react with ammonical silver nitrate?
- (a)
1-butyne
- (b)
2-butyne
- (c)
1-butene
- (d)
2-butene
Which of the following is not an electrophile?
- (a)
BF3
- (b)
Hg2+
- (c)
AlCl3
- (d)
NH3
In the chlorination of benzene,the chlorating agent is
- (a)
Cl2
- (b)
Cl-
- (c)
Cl+
- (d)
HCl
The attacking species in aromatic sulphonation is
- (a)
SO2+
- (b)
HSO4-
- (c)
SO3
- (d)
HSO4+
Westron,a good industrial solvent,is
- (a)
acetylene tetrachloride
- (b)
trichloro ethylene
- (c)
dichloro difluoromethane
- (d)
hexachloro cyclohexane
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
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
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
To find out whether C3H4 contains two double bonds or a triple bond,the test performed would be treating it with
- (a)
bromine water
- (b)
Bayer's reagent
- (c)
Fehling's solution
- (d)
Ammoniacal silver nitrate
which one of the following is a free radical?
- (a)
FeCl3
- (b)
Cl
- (c)
Cl
- (d)
Cl-
Number of acidic hydrogen atoms in butyne-1 is
- (a)
2
- (b)
3
- (c)
1
- (d)
4
An electrophilic molecule is
- (a)
BF3
- (b)
NH3
- (c)
H2O
- (d)
ROH
Which one of the following is not an electrophile?
- (a)
BF
- (b)
NH3
- (c)
H+
- (d)
Br+
Which one of the following groups have positive inductive effect (electron repelling)?
- (a)
C6H5
- (b)
OCH3
- (c)
C2H5
- (d)
NO2
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
Which one of the following hydrocarbons is the principle organic product of reaction between H2O and Al carbide?
- (a)
ethane
- (b)
ethene
- (c)
ethyne
- (d)
methane
Acetylene on oxidation with chromic acid gives
- (a)
formaldehyde
- (b)
oxalic acid
- (c)
formic acid
- (d)
acetic acid
An example of an electrophilic substitution is
- (a)
chlorination of methane
- (b)
dehydration of ethanol
- (c)
nitration of benzene
- (d)
polymerisation of ethylene
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
How many mono derivatives will be formed when neopentane
\(\quad \quad \quad \quad { CH }_{ 3 }\\ \quad \quad \quad \quad \quad |\\ { CH }_{ 3 }-C-{ CH }_{ 3 }\\ \quad \quad \quad \quad \quad |\\ \quad \quad \quad \quad \quad { CH }_{ 3 }\)
reacts 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 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:
\(\left( { CH }_{ 3 } \right) _{ 3 }-C-Br\overset { { H }_{ 2 }O }{ \longrightarrow } { \left( { CH }_{ 3 } \right) }_{ 3 }-C-OH\)
is an example of
- (a)
elimination reaction
- (b)
substitution reaction
- (c)
free radical reaction
- (d)
displacement reaction
Arrangement of (CH3)3-C-, (CH3)2-CH-, CH3-CH2- when attached to benzyl or an unsaturated group in increasing order of inductive effect is
- (a)
(CH3)3-C-<(CH3)2-CH-<CH3- CH2-
- (b)
CH3-CH2-<(CH3)2-CH-<(CH3)3-C-
- (c)
(CH3)2-C-<(CH3)2-C-<CH3-CH2-
- (d)
(CH3)3-C-<CH3-CH3-CH2-<(CH3)2???????-CH-