CHAPTER # 7 Fundamental Principles of Organic Chemistry MCQs
1. The
state of hybridization of carbon atom in
methane is
(A)
Sp3 (B)
Sp2
(C)
Sp (D) dsP2
2. In
t-butyl alcohol, the tertiary carbon is bonded
to
(A)
Two hydrogen atoms
(B)
Three hydrogen atoms
(C)
One hydrogen atoms
(D)
No hydrogen atoms
3. Which
set of hybrid orbitals has planar
triangular shape
(A) Sp3 (B) Sp
(C) Sp2 (D) dsp2
4. The
chemist who synthesized urea from
ammonium cyanate was
(A) Berzelius (B) Kolbe
(C) Wholer (D) Lavoisier
5. Linear
shape is associated with which set of hybrid orbitals ?
(A) Sp (B) Sp2
(C) Sp3 (D) dsp2
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6.
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A double bond consists of.
(A) Two sigma bond
(B) One sigma and one pi bond
(C) One sigma and two pi bond
(D) Two pi-bond
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7.
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Ethers show the phenomenon
of
(A) Position isomerism
(B) Functional group isomerism
(C) Metamerism
(D) Cis-trans isomerism.
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8.
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Select from the following
the one which is
(A) CH3 --------CH2--------OH
(B) CH3---------O-----------CH3
(C) CH3COOH
(D) CH3--------CH2--------Br
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alcohol.
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9.
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Early chemists recognized organic compounds
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distinct from inorganic compounds because of
(A)
The difference in their
origin and properties
(B)
The similarities in their
origin but difference in their
propertied
(C)
Both of the above
(D)
None of the above
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10.
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The vital force theory was
rejected by
A) Jhon Dalton B)
Friedrick Wohler
C) Dmitri Mendeleev D) None of the above
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11.
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We have become dependent for our food
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medicines and clothing to which compounds.
(A) Inorganic compounds
(B) Organic compounds
(C) Both of the above
(D) None of the above
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12.
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Natural Gas is a
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(A)
Mixture of hydrocarbons
(B)
Methane
(C)
Both of the above
(D)
Nonn of the above
13.
In Pakistan the natural gas
is used for.
(A)
For power generation only
(B)
In coment and fertilizer
industries only (C) As a fuel in general industries and for domestic purposes (D) All of the above
are truce
14.
At what temperature coal is
heated in the observe of air for converting it into coke, coal gas,
and coal tar
(A) Temperature ranging from 500-1000oC
(B) Temperature ranging from 100-1000oC
(C) Temperature ranging from 300-2000oC
(D)
Temperature ranging from
1000-3000oC
15.
Cracking of petroleum is
taken place by
(A)
Thermal cracking B)
Catalytic cracking
C)
Steam cracking D) All of the above
16.
The structure of alkynes
can be explained by yet another mode of hybridization called as
(A)
Sp2 hybridization
(B)
Sp3 hybridization
(C)
Sp5 hybridization
(D)
Sp hybridization
17. Metamerism
aries due to the.
(A)
Equal distribution of
carbon atoms
(B)
Unequal distribution of
carbon atoms
(C)
Both of the above are true
(D)
None of the above are true
18. Cis-trans
isomerism is also called as
(A)
Geometric Isomerism
(B)
Position Isomerism
(C)
Chain Isomerism
(D)
Metamerism
19. Coal,
petroleum and natural gas are important
sources of.
(A)
Organic compounds
(B)
Inorganic compounds
(C)
Both of the above
(D)
None of the above
20. Organic
compounds are classified into
(A)
Acyclic and cyclic compound
(B)
Acyclic & Heterocyclic
(C)
Non-cyclic
(D)
All of the above
21. Rate
of reactions of most organic compounds
are___________
a)
Very slow
b)
Very fast
c)
Medium
d)
No regular character
present
22. Coal
is produced after a long time decay of
__________
a)
Animals b)
Fossils
c)
Wood d)
Ores
23. Ether
functional group can be represented
as____________
a)
–OH b)
R-CO-R
c)
R-O-R d)
R-COOH
24. 2-propanol
can show isomerism as _______
a)
Metamerism
b)
Functional group isomerism
c)
Geometric isomerism
d)
None of above
25. The
hydrocarbons which give smoke on burning
is called________
a)
Aliphatic b)
Aromatic
c)
Carboxylic acid d) Aldehydes
26. In
sp3 hybridization, the geometry of molecules will be_________
a)
Square planar b) Trigonal
pyramidal
c)
Tetrahedral d) All are possible
27. Only
sigma bonds are present in _______
b) Propene b) Butanoic acid
c)
Butanal d)
Ethoxy butane
28.
In alkyne, the
hybridization is____________
a) sp2 b) sp
c)
sp d)
All
29.
Octane no. of any fuel can
be improved by ______
a) Pyrolysis b)
Reforming
c)
Polymerization d) Condensation
30.
The fuel having 40%
n-heptane & 60% iso-octane will have octane number
a) 40 b)
60
c) 80
d)
90
31.
Which of them is
heterocyclic organic compound?
a) Benzene b)
Cresol
c)
Naphthalene d) Pyridine
32.
Which one is the mixture of
215 organic compounds?
a) Water gas b)
Coal gas
c)
Coal tar d)
Crude coal gas
33.
Octane number is the
percentage of
a) n-pentane in a mixture
b) n-butane in a mixture
c) n-hexane in a mixture
d) 2, 2, 4 – trimethyl pentane in a mixture
34.
During the fractional
distillation of petroleum, paraffin oil boils between the ranges
a) 25oC b) 40 – 180oC
c)
175 – 275oC d) 220 – 350oC
35.
The octane number of
gasoline may increased by adding
a) EDTA b)
NaOH
c)
AgNO3 d)
PB(C2H5)4
36.
Which process increases the
yield of gasoline from petroleum?
a) Cracking b)
Polymerization
c)
Reforming d)
Sublimation
37.
Consider the reaction
3C2H2 Cutube C6H6 This is the example of
a) Pyrolysis b)
Polymerization
c)
Sublimation d) Addition
38.
Which one is acyclic
hydrocarbon?
a) C6H6 b) C2H6
c) C6H12 d)
CH4
39.
Which type of isomerism is
shown by the following compounds? CH3 – CH2 – CHO, CH3
– CO – CH3
a) Chain isomerism
b) Position isomerism
c) Metamerism
d) Functional group isomerism
40.
The type of isomerism found
in 1 – butene and 2 – butane is
a) Position b)
Chain
c)
Functional group d) Metamerism
41.
The members of which of
these have similar methods of preparation and properties
a) Isomers b)
Homologues
c)
Polymers d)
Monomers
42.
The maximum number of
isomers for an alkene with molecular formula C4H8 is
a) 2 b)
3
c) 4 d)
5
43.
Which of the following is
most stable ion?
a) CH3 – H2C+
b) (CH3)2
HC+
c)
(CH3)3 C+ d)
All of these
44.
Which of the following is
not an organic compound?
a) Urea b) Oxalic acid
c)
Natural gas d) Plaster of Paris
45.
Kerosine oil is a mixture
of
a) Alkane b)
Alkene
c)
Alkynes d)
All of these
46.
Which of the following compounds
does not contain an OH group?
a) Alcohol b)
Phenol
c)
Aldehyde d)
Carboxylic acid
47.
The chemical formula of
chloride is
a) CH3OH b)
CCl3OH
c)
CCl3CHO d) None of these
48.
Petroleum in the unrefined
form is called ____
a) Rock oil b)
Coal gas
c)
Crude oil d)
Both a & c
49.
Natural gas mainly consists
of ________
a) Methane b)
Ethane
c)
Propane d)
Butane
50.
_______ is a mixture of
methane, ethane, propane and butane, used as a fuel and
for making
other organic chemicals.
a) Refinery gas b) Gasoline
c)
Kerosene oil d) Gas oil
51.
A large number of organic
compounds, especially the unsaturated ones, show a great tendency
to unit. This process is termed as
______
a) Pyrolysis b)
Cracking
c)
Polymerization d) None of these
52.
An isomer of ethanol is
________
a) Dimethyl ether b)
Diethyl ether
c)
Ethylene glycol d) Methanol
53.
When ethylene is heated
under pressure, a transparent solid polymer, ________ is obtained.
a) Polyethene b) Ethane
c)
Methane d)
None of these
54.
The quality of petroleum is
determined by
_______
a) Decane number b) Octane number
c)
Hexane number d) None of these
55.
Two or more than two
different compounds having the same molecular formula but
different
carbon chains or skeletons are said
to
be ______
a) Chain isomers
b) Position isomers
c) Functional group isomers
d) Metamers
56.
The kind of isomerism which
depends upon the relative position of the functional group, or the
position of double or tripe bond in case of
unsaturated compounds
is termed as
________
a) Chain isomerism
b) Position isomerism
c) Functional group isomerism
d) Metamerism
57.
Isomerism, which involves
compounds having the same molecular formula, but
different
functional
groups are called _______
a) Chain isomerism
b) Position isomerism
c) Functional group isomerism
d) Metamerism
58.
_______ is exhibited by
compounds having the same functional group but different
alkyl attached
to the same multivalent atom.
a) Chain isomerism
b) Position isomerism
c) Functional group isomerism
d) Metamerism
59.
In cracking usually
catalyst used is _______
a) Pt b)
Aluuminosilicate
c)
Ni d)
Tetra ethyl lead
60.
In CCl4 molecule
the four valencies of carbon
atom
are directing towards the corners of a
_______
a) Cube b)
Hexagon
c)
Prism d)
Tetrahedron
61.
The general formula (RCO)2O
represents
________
a) An ether b)
Ketone
c)
An ester d)
An acid hydride
62.
______ has the longest bond
length.
a) C = C b)
C ≡ C
c)
C – C d)
All of these
63.
Compounds in which two
alkyl groups are attached to an oxygen atom are called ______
a)
Alkanes b)
Ethers
c)
Alcohols d)
Isomer
64.
________ is the common name
of methanol.
a)
Formaldehyde b) Acetaldehyde
c)
Propionaldehyde d) None of these
65.
______ is the common name
of propanone.
a)
Acetone b)
Ketone
c)
Diethyl ketone d) None to these
66.
The properties of organic
compounds are due
to
_______
a)
Covalent bonds b) Functional
groups
c)
Ionic bonds d) None of these
67.
______ of the following are
isomers.
a)
Methyl alcohol and dimethyl
ether
b)
Ethyl alchohol and dimethyl
ether
c)
Acetone and Acetaldehyde
d)
Proponoic acid and
propanone
68.
Which compound contains an
sp hybridized C atom?
a)
CH3CN b)
CH3CHO
c)
CH3NH2 d)
None
69.
Which of the following
isomeric substances
would be expected to have the lowest
boiling point?
a)
Hexane b)
2 – methlypentane
c)
2, 2 – dimethylbutane d) 3 – methlypentane
70.
The isomers must have the
same ______
a)
Structural formula b) Molecular
formula
c)
Chemical formula d) Physical
properties
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