WorksheetsOrganic and Physical Chemistry
Total questions: 40
Worksheet time: 48mins
Name
Class
Date
1.
What is the reactive intermeidate in the reaction of 1,3 butadiene with <br />HBr which results 1,2 and 1,4 addition?
a)
an allylic radical
b)
dienophile
c)
an allylic carbocation
d)
bromonium cation
2.
Which of the following are conjugated dienes?
a)
3-bromo-2-butene
b)
1,2-butadiene
c)
1,3-butadiene
d)
1,5-pentadiene
3.
What is the thermodynamic product obtained from addition of 1 mole <br />of HBr to 1,3 butadiene?
a)
3-bromo-2-butene
b)
1-bromo-2-butene
c)
4-bromo-1-butene
d)
3-bromo-1-butene
4.
Which of the following term describes the mechanism for the Diels-Alder reaction of 3-butene-2-one with 1,3 butadiene?
a)
electrophilic addition
b)
electrophilic substitution
c)
cyclo addition
d)
nucleophilic addition
5.
Conjugated diene reacts with which among the following to form a cyclohexane?
a)
Phenol
b)
Dienophile
c)
Hexane
d)
Tribromo phenol
6.
The product formed in Diels-Alder reaction is commonly called as
a)
Cross linked product
b)
alkane derivative
c)
linear product
d)
Adduct
7.
Identify the correct increasing order of stability of dienes
a)
cumulated dienes< isolated dienes<<br />conjugated dienes
b)
conjugated dienes<isolated dienes<cumulated dienes
c)
isolated dienes<cumulated dienes<conjugated dienes
d)
none of the above
8.
Which is the most predominant product formed in electrophilic substitution reaction?
a)
1,2 addition
b)
1,2 addition and 1,4 addition
c)
1,4 addition
d)
all the above
9.
If the heat of hydrogenation is high the stability of dienes are
a)
High
b)
Low
c)
Medium
d)
Very high
10.
Bond length is high for……..
a)
Isolated dienes
b)
Cumulated dienes
c)
Conjugated dienes
d)
Akanes
11.
The boiling point of cycloalkanes areincreased by increasing
a)
addition of salts
b)
molcular weight
c)
solubility
d)
equivalent weight
12.
If rubber is heated with sulphur at 140 ̊C is called as…….
a)
sulphonation
b)
reduction
c)
neutralization
d)
Vulcanisation
13.
Benzene on reduction with reducing agent to form……
a)
cycloalkane
b)
phenol
c)
amine
d)
amide
14.
The free radical reaction is initiated by…….
a)
cation
b)
anion
c)
initiator
d)
carbocation
15.
Cyclopropane is reacted with HBr to form………
a)
1,3-dibromo propane
b)
1-bromo propane
c)
1,2-dibromo propane
d)
3-bromo propane
16.
The monomer used in the preparation of rubber is…….
a)
Isoprene
b)
1,3 butadiene
c)
1,4 pentadiene
d)
propadiene
17.
The ring opening reaction of cyclopropane with bromine forms……
a)
cyclo bromopropane
b)
1,3 dibromo propane
c)
1,2 dibromo propane
d)
1-bromo propanes
18.
Cyclopropane is reacted with HI to form………
a)
propylene
b)
propane
c)
iodo propane
d)
propyl iodide
19.
The nitration product of phenol is
a)
ortho nitrophenol
b)
meta nitrophenol
c)
mixture of ortho and <br />para nitrophenol
d)
para nitrophenol
20.
Monohydric phenol is……… in water
a)
insoluble
b)
partially soluble
c)
souble
d)
none of the above
21.
Phenol is reacted with sodium metal to from
a)
sodium phenolate
b)
phenoxide
c)
sodium phenoxide
d)
picric acid
22.
When phenol is reacted with benzoyl chloride to form
a)
napthalene
b)
phenyl chloride
c)
azo compound
d)
phenyl benozate
23.
The alkylation product of phenol is
a)
toluene
b)
p-tert-butyl phenol
c)
nitro phenol
d)
sodium salicylate
24.
The formation of salicyaldehyde from phenol and chloroform is called as
a)
riemer-tiemann reaction
b)
gattermann reaction
c)
kolbe reaction
d)
witz reaction
25.
Preparation of phenol from chloro benzene and sodium hydroxide is
a)
physical process
b)
thermodynamic process
c)
dows process
d)
sodo process
26.
The acidic nature of phenol is measured by
a)
thermal energy
b)
external energy
c)
kinetic energy
d)
dissociation energy
27.
The sulphonation product of phenol at 15-20 ̊C is
a)
ortho phenol sulfonic acid
b)
para phenol sulfonic acid
c)
meta phenol sulfonic acid
d)
mixture of ortho and para phenol <br />sulfonic acid
28.
Give an example for Lewis acid is……..
a)
ammonia
b)
pottasium chloride
c)
aluminum chloride
d)
HCl
29.
When phenol is reacted with dilute nitric acid to give ……….
a)
2,4,6 tri nitro phenol
b)
mixture of ortho and para nitro phenol
c)
mixture of ortho and meta <br />nitro phenol
d)
para nitrophenol
30.
The bromination product of phenol at 0 ̊ C is……...
a)
para bromo phenol
b)
ortho bromo phenol
c)
meta bromo phenol
d)
phenol bromide
31.
Amines which are bonded in two alkyl groups are
a)
primary amine
b)
secondary amine
c)
tertiary amine
d)
quaternary amine
32.
The reductive animation of an aldehyde can be carried out using <br />which of the following reducing agent
a)
lithium aluminium hydride
b)
sodium cyano borohydride
c)
sodium borohydride
d)
zinc amalgam
33.
Which of the following is not a primary amine?
a)
cyclohexylamine
b)
1-butylamine
c)
3-hexylamine
d)
diethylamine
34.
Reductive animation of an aldehyde using ammonia will lead to form
a)
a primary amine
b)
a secondary amine
c)
a quaternary ammonium salt
d)
a teriary amine
35.
Which of the following compound will not undergo azo coupling reaction with benzene diazonium chloride
a)
aniline
b)
phenol
c)
anisole
d)
nitrobenzene
36.
The reaction of aniline with chloroform under alkaline conditions leads to the formation of
a)
phenyl cyanide
b)
phenyl isonitile
c)
phenyl cyanate
d)
phenyl isocyanate
37.
IUPAC name of CH2=CHCH2NHCH3
a)
allylic compound
b)
2 amino-4-pentene
c)
4-amino pent-1-ene
d)
N-methyl prop-2-en-1-amine
38.
Reduction of nitrobenzene by which of the following reagents give aniline
a)
Sn/HCl
b)
Fe/HCl
c)
H2-Pd
d)
Sn/NH4OH
39.
Acid anhydrides on reaction with primary amines give
a)
amide
b)
imide
c)
secondary amine
d)
imine
40.
Hoffmann elimination from quaternary ammonium salts produces
a)
alkanes
b)
alkyne
c)
alkene
d)
acetic anhydride
100 %
