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
The number of dibromo derivatives of propane are:
- (a)
5
- (b)
4
- (c)
3
- (d)
2
Nitroalkanes exhibit
- (a)
chain isomerism
- (b)
position isomerism
- (c)
function isomerism
- (d)
tautomerism
- (e)
All of the above
How many structural isomers are possible for C2H4Br2?
- (a)
4
- (b)
3
- (c)
2
- (d)
1
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 one of the following is not an electrophilic reagent?
- (a)
\(\ge N:\)
- (b)
H2O2
- (c)
O2
- (d)
Br2
A compound which is insoluble in cold conc.H2SO4 is
- (a)
n-butane
- (b)
1-butene
- (c)
1-butylene
- (d)
ethyl acetate
Which of the following compounds will not react with HBr?
- (a)
C2H4
- (b)
C2H6
- (c)
C2H2
- (d)
C2H5OH
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
Lewisite,a poisonous gas used in world war II,is formed by the action of AsCl3 with
- (a)
CH=CH
- (b)
CH2=CH2
- (c)
CH3-CH3
- (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
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)
\({ CH }_{ 2 }\underset { - }{ =CH- } C{ H }_{ 3 }\)
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
Molecule in which the distance between two adjacent carbon atoms is smallest would be
- (a)
ethyne
- (b)
ethene
- (c)
ethane
- (d)
benzene
Which of the following is the most stable?
- (a)
CH3+
- (b)
RCH+
- (c)
R2CH+
- (d)
R3C+
The alkene which on ozynolysis yield acetone is;
- (a)
CH2=CH2
- (b)
CH3-CH=CH2
- (c)
(CH3)2-C=C(CH3)2
- (d)
CH3-CH=CH-CH3
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
Ethylene reacts with cold,dilute alkaline solution of potassium permangenate to yield
- (a)
CH3CHO
- (b)
two moles of CO2
- (c)
two moles of HCHO
- (d)
C2H4(OH)2
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 groups have positive inductive effect (electron repelling)?
- (a)
C6H5
- (b)
OCH3
- (c)
C2H5
- (d)
NO2
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
An aqueous solution of a substance on electrolysis gives ethane.The substance is
- (a)
acetic acid
- (b)
acetamide
- (c)
potassium acetate
- (d)
ethyl acetate
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 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
Which of the following compounds have wrong IUPAC name?
- (a)
\(CH_3CH_2-CH_2-COO-CH_2CH_3\)\(\rightarrow \) ethyl butanoate
- (b)
\({ CH }_{ 3 }-CH-{ CH }_{ 2 }-CHO\\\ \quad \quad \quad\quad |\\ \quad \quad \quad \quad { CH }_{ 3 }\) \(\rightarrow \) 3-methyl butanol
- (c)
\({ CH }_{ 3 }-CH-CH-{ CH }_{ 2 }-CHO\ \\ \quad \quad \quad |\quad \quad \quad |\\ \quad \quad \quad OH\quad { CH }_{ 3 }\)\(\rightarrow \)2-methyl-3-butanol
- (d)
\(\quad\quad \quad \quad \quad \quad O\\ \quad \quad \quad \quad \quad \quad \parallel \\ { CH }_{ 3 }-CH-C-{ CH }_{ 2 }-CH_{ 3 }\ \\ \quad \quad \quad \quad \quad \quad |\quad \quad \quad \\ \quad \quad \quad \quad \quad \quad { CH }_{ 3 }\)\(\rightarrow \)2-methyl-3-pentanone