ECAT Pre Engineering Chemistry Chapter 6 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 6 Chemical Bonding

Try The MCQ's Test For ECAT Chemistry Chapter 6 Chemical Bonding

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ECAT Chemistry Chapter 6 Chemical Bonding

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Question # 1

Number of sigma bonds in P4O10is

Question # 2

When elements of group I react with the elements of group VIA theory form

Question # 3

When of the following is isolelectronic with krypton

Question # 4

Noble gases have the electronic configuration with their valance shell ns2np6except one

Question # 5

Which one of these is weakest?

Question # 6

The ionic bonds are

Question # 7

The shape of the molecule SF2Cl2is

Question # 8

Ionization energies increase from left to right along the period due to

Question # 9

According to MO Theory, the species O2+ possesses

Question # 10

The shape of gaseous SnCl2is

Question # 11

Maximum hydrogen bonds in water are

Question # 12

Which for the following has no dipole moment

Question # 13

Antibonding MO is formed by

Question # 14

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Question # 15

A molecule in which sp2hybrid orbitals are used by the central atom in forming covalent bonds in

Question # 16

Shielding effect intervening electrons causes

Question # 17

The bond angle H - O - H in ice ins closest to

Question # 18

Which of the following molecules have sp3hybridized carbon

Question # 19

Which of the following statements is not correct regarding bonding molecular orbitals?

Question # 20

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Question # 21

The most suitable method of the separation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1: 1 is

Question # 22

All covalent bonds formed between the two atoms are non-polar when

Question # 23

The three N - Hσ-bonds are made by

Question # 24

The covalent bonds are

Question # 25

The nature of interparticle forces in benzene is

Question # 26

Which of the following is a polar molecules

Question # 27

Hydrogen chloride molecule contains

Question # 28

In which of the following theories the hybridizationis considered

Question # 29

The Electro-negatively difference for ionic bond must be greater than

Question # 30

Size of an anion is increased as compared to its atom because of the

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Sr.# Question Answer
1 Noble gases have the electronic configuration with their valance shell ns2np6except one
A. He
B. Ne
C. Kr
D. Xe
2 Which of the following molecules have multiple bonds
A. CH4
B. C2H4
C. C2H6
D. CCI4
3 Which of the following has polar bond
A. O2
B. N2
C. HCl
D. Cl2
4 Ionic radius, in a period from left to right
A. Increases
B. Decreases
C. Decreases then increases
D. Increases and decreases
5 B-atom in BF3has
A. sp3hybridization
B. sp2hybridization
C. sp hybridization
D. no hybridization
6 Water H2O is liquid while hydrogen sulphide H2S is a gas beause
A. Water has higher molecular weight
B. Hydrogen sulphide is a weak acid
C. Sulphure has high electronegativity than oxyhe
D. Water molecules associate through hydrogen bonding
7 In OF2, number of bond pairs and Ione paris of electrons are respectively
A. 2,6
B. 2,8
C. 2,10
D. 2,9
8 N-atom forms three covalent bonds, its electronic configuration is
9 Electronegativity values of the elements F, CI and Br vary
A. F > CI > Br
B. Br > CI > F
C. Cl > Br > F
D. CI > F > Br
10
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A. Excitantion of an electron from 2s to 2p-orbital
B. Transfer of three electrons from B to the other atoms
C. Excitation of two electrons form 2s orbital to 2p orbital
D. Formation of molecular ion
11 Fluorine molecule is formed by
A. The axial p-p overlap
B. The sidewise p-p overlap
C. The axial s-p overlap
D. The overlap of two sp2hybrid orbitals
12 From the difference between expected bond energies for the normal covalent bond and experimentally determined values Pauling calculated the values of
A. Ionization potential of elements
B. Electron affinity of elements
C. Electronegativity of elements
D. Bond length
13 Among the alkaline earth metals the element forming predominantly covalent compounds is
A. Be
B. Mg
C. Sr
D. calcium
14 The bond angle H - O - H in ice ins closest to
A. 120° , 28'
B. 60°
C. 90°
D. 109°
15 The atomic radius of hydrogen is 37
A. Pecometer
B. Manometer
C. Angstrom
D. Micrometer
16 Elements have the tendency to attain 8 electrons in their valence shell. This is known as
A. Octer rule
B. Hunds rule
C. Pauli exclusion principle
D. Auf ban principle
17 Mg becomes isoelectronic with neon when it
A. Loses two electrons
B. Gains two electrons
C. Loses 1 electron
D. Gains 1 electron
18 The Electro-negatively difference for ionic bond must be greater than
A. 1.6
B. 1.7
C. 1.8
D. 1.0
19 The bond order for He2molecule is
A. zero
B. 1/2
C. 1
D. 2
20 The boiling point of heavy water is
A. 108°C
B. 101.4°C
C. 99°C
D. 110°C
21 Which of the following geometry is associated with the compound in which the central atom assumes sp3d hybridization?
A. Planar
B. Pyramidal
C. Angular
D. Trigonal bipyramidal
22 Shielding effect intervening electrons causes
A. Decreases in atomic radii in a period from right to left
B. Increase in atomic radii in a period from left to righ t
C. Decrease in atomic radii down the group
D. Increase in atomic radii down the group
23 In which of the following theories the hybridizationis considered
A. Vsepr
B. Lewis
C. Molecule orbital
D. Valence bond
24
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A. The ionization energy of A is high and electron affinity of B is low
B. The ionization energy of A is low and electron affinity of B is high
C. Both the ionization energy of A and electron off affinity of B are high
D. Both the ionization energy of A and electron affinity of B are low
25 Which of the following hydrides has the lowest boiling point?
A. H2O
B. H2S
C. H2S3
D. H2Te
26 The electron affinity of chlorine may be represented by the equation
27 On the basis of VSEPR theory SO2is a
A. Liner molecule
B. A bent molecule
C. A strong molecule
D. A gaseous molecule
28 An ionic compound M2S3is formed by the metal M,, the metal is
A. Ca
B. Ba
C. K
D. Al
29 XeF4has shape of
A. Sphere
B. Trigonal bipyramidal
C. Tetrahedral
D. Square planar
30 The number of bonds in nitrogen molecule is

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