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Online Tests
ECAT Chemistry Chapter 6 Chemical Bonding Online Test MCQs With Answers
Question # 1
A bond between two atoms may be obtained by sharing of electrons such a bond is called
Choose an answer
An ionic bond
A coordinate bond
A dative bond
A covalent bond
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Question # 2
Hydrogen chloride molecule contains
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Covalent bond
Double bond
Co-ordinate bond
Electrovalent bond
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Question # 3
Mg becomes isoelectronic with neon when it
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Loses two electrons
Gains two electrons
Loses 1 electron
Gains 1 electron
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Question # 4
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The ionization energy of A is high and electron affinity of B is low
The ionization energy of A is low and electron affinity of B is high
Both the ionization energy of A and electron off affinity of B are high
Both the ionization energy of A and electron affinity of B are low
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Question # 5
During the formation of a chemical bond the potential energy of the system
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Decreases
Increases
Does not change
None of these
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Question # 6
Number of sigma bonds in P
4
O
10
is
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6
7
17
16
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Question # 7
According to MO Theory, the species O
2
+ possesses
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bond order of 2.5
three unpaired
diamagnetic character
stability lower then O
2
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Question # 8
All covalent bonds formed between the two atoms are non-polar when
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Covalent bond between two non-metal atoms
Covalent bond between metal and non-metal
Covalent bond between two atoms of same element
Covalent bond between metal atoms
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Question # 9
The structure of ICI
2
is
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Trigonal
Trigonal bipyramidal
Octahedral
Square planar
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Question # 10
Among the alkaline earth metals the element forming predominantly covalent compounds is
Choose an answer
Be
Mg
Sr
calcium
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Question # 11
In H
2
O molecule the bond angle is
Choose an answer
90°
109.5°
107°
104.5°
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Question # 12
The nature of interparticle forces in benzene is
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Dipole-dipole interaction
Dispersion force
Ion-dipole interaction
H-bonding
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Question # 13
Planar geometry of molecules is due to
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sp
3
hybridization
sp
2
hybridization
sp hybridization
P - p overlap
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Question # 14
In sp
2
hybridization bond angle is _____
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120°
180°
109.5°
None
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Question # 15
The Electro-negatively difference for ionic bond must be greater than
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1.6
1.7
1.8
1.0
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Question # 16
Which of the hydrogen halides has the highest percentage of ionic character
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HCl
HBr
HF
HI
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Question # 17
In a group the atomic size increase downward due to
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Addition of electronic shells
Increase in the proton number
Repulsion of electrons
All of the above
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Question # 18
Atoms obey octet rule by sharing-electrons making covalent bonds according to
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Lewis and Kossal theory
Valance bond theory
VSEPR theory
Molecular orbital theory
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Question # 19
Water H
2
O is liquid while hydrogen sulphide H
2
S is a gas beause
Choose an answer
Water has higher molecular weight
Hydrogen sulphide is a weak acid
Sulphure has high electronegativity than oxyhe
Water molecules associate through hydrogen bonding
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Question # 20
When an electron is absorbed in an empty or partially filled orbital of an atom, the energy released is called
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Ionization energy
Potential energy
Electron affinity
Bond energy
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Question # 21
Which of the following charge
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Li
Be
H
He
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Question # 22
The most suitable method of the separation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1: 1 is
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Distrillation
Crystallization
Vapourisation
Colour spectrum
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Question # 23
Choose an answer
154 pm
133 pm
120 pm
150 pm
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Question # 24
Two H-atom combine to form a strong H
2
molecule due to
Choose an answer
Increase in potential energy
Decrease in potential energy
Energy remains unchanged
Distance is increased
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Question # 25
Which of the following geometry is associated with the compound in which the central atom assumes sp
3
d hybridization?
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Planar
Pyramidal
Angular
Trigonal bipyramidal
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Question # 26
Which of the following phenomena will occur when two atoms of the elements having same spin of electron approach for bonding?
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Orbital overlap will not occur
Bonding will not occur
Both (A) and (B) are correct
None of the above are correct
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Question # 27
Which of the following is a polar molecules
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Carbon dioxide
Carbon tetrachloride
Methanol
Ethane
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