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

The bond order in No is 2.5 while that in NO+is 3.Which of the following statements is true for these two species?

Question # 2

The bond angles in methane CH4are equal to

Question # 3

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

Question # 4

Coordinate covalent bond is present in the molecules

Question # 5

The bond order of individual C - C bond is benzene is

Question # 6

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

Question # 7

The ionic bonds are

Question # 8

One of the following bonds is polar but compound is non-polar

Question # 9

When of the following is isolelectronic with krypton

Question # 10

In sp2hybridization bond angle is _____

Question # 11

The electronegativity of elements in a period from left to right

Question # 12

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Question # 13

When two hydrogen atoms approach to form a chemical bond

Question # 14

Maximum hydrogen bonds in water are

Question # 15

The tendency of an atom to attract shared electron pair towards itself is called

Question # 16

Generally ionization energy of atoms decreases by

Question # 17

The bond angle depends upon the

Question # 18

Which of the following molecules has unpaired electrons in anti-bonding molecular orbitals?

Question # 19

Which of the following molecules have its central atom sp2hybridized

Question # 20

When an electron is absorbed in an empty or partially filled orbital of an atom, the energy released is called

Question # 21

Which carbon is more electronegative?

Question # 22

The boiling point of heavy water is

Question # 23

Which one of these is weakest?

Question # 24

The formation of compounds like PF5, BCI3, SF6indicates that

Question # 25

Hydrogen chloride molecule contains

Question # 26

Which of the following molecules have sp3hybridized carbon

Question # 27

Which of the following has highest bond order

Question # 28

The degree of polarity of molecule is known as its

Question # 29

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

Question # 30

Ca, Mg, Be, Ba, belong to the same group, the order of their ionization energy values is

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Sr.# Question Answer
1 The shape of CIO-3according to valence shell electron pair repulsion theory will be
A. Planar triangle
B. Pyramidal
C. Tetrahedral
D. Square planar
2 The number of antibonding electron pairs in O2-molecular ion on the basis of MOT is
A. 4
B. 3
C. 2
D. 5
3 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
4 N-atom forms three covalent bonds, its electronic configuration is
A. Choice 1
B. Choice 2
C. Choice 3
D. Choice 4
5 The bond order O2molecule is
A. 1
B. 2
C. 3
D. Zero
6 Nitrogen in NH3is sp3hybridized but the bond angle in NH3is 107° and not 109.5° due to
A. sp3orbital planar
B. sp3orbital trigonal
C. Repulsion between lone pair and bonded pairs
D. None of them
7 Which of the following molecules has a net dipole moments
A. CO2
B. CS2
C. SO2
D. CCI4
8 Noble gases have the electronic configuration with their valance shell ns2np6except one
A. He
B. Ne
C. Kr
D. Xe
9 The bond order of individual C - C bond is benzene is
A. One
B. Two
C. Between one and two
D. One and two alternately
10 Inter molecular forces in solid hydrogen are
A. Covalent forces
B. Van der Waal forces or London dispersion forces
C. Hydrogen bonds
D. All of these
11 The three N - Hσ-bonds are made by
A. sp3- s overlap
B. sp2- s overlap
C. P - p overlap
D. sp - overlap
12 Which of the following statements is not correct regarding bonding molecular orbitals?
A. Bonding molecular orbitals possess less energy than atomic orbitals from which they are formed
B. Bonding molecular orbitals have low electron density between the two nuclei
C. Every electron in the bonding molecular orbitals contributes to the attraction between atoms
D. Bonding molecular orbitals are formed when the electron waves undergo constructive interference
13 The shape of gaseous SnCl2is
A. Tetrahedral
B. Linear
C. Angular
D. T-shaped
14 Antibonding MO is formed by
A. Addition of atomic orbitals
B. Substraction of atomic orbitals
C. Multiplication of atomic orbitals
D. None of these
15
Question Image
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
16 The bond order for He2molecule is
A. zero
B. 1/2
C. 1
D. 2
17 Which of the following has polar bond
A. O2
B. N2
C. HCl
D. Cl2
18 Which is made by coordinate covalent bond
A. H3O+
B. H2O
C. CH4
D. HCl
19 The shape of the molecule SF2Cl2is
A. Trigonal bipyradmidal
B. Cubic
C. Octahedral
D. Tetrahedral
20 One of the following bonds is polar but compound is non-polar
A. H2O
B. NH3
C. HCl
D. CO2
21 During the formation of a chemical bond the potential energy of the system
A. Decreases
B. Increases
C. Does not change
D. None of these
22 The tendency of an atom to attract shared electron pair towards itself is called
A. Covelent bond
B. Electronegativity
C. Ionization potential
D. Electronic affinity
23 Which of the following molecules has unpaired electrons in anti-bonding molecular orbitals?
A. O2
B. N2
C. Br2
D. F2
24 A bond between two atoms may be obtained by sharing of electrons such a bond is called
A. An ionic bond
B. A coordinate bond
C. A dative bond
D. A covalent bond
25
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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
26 The electronegativity of elements in a period from left to right
A. Decreases
B. Increases
C. First decreases then increases
D. First increases then decreases
27 Which of the following species has unpaired electrons in antibonding molecular orbitals
A. Choice 1
B. Choice 2
C. Choice 3
D. Choice 4
28 When two hydrogen atoms approach to form a chemical bond
A. The repulsive forces dominate the attractive forces
B. The attractive forces, dominate the repulsive forces
C. The energy of atoms increases
D. The two atoms start ionization
29 When of the following is isolelectronic with krypton
A. Ca++
B. Al+++
C. Br-1
D. I-1
30 An ionic compound M2S3is formed by the metal M,, the metal is
A. Ca
B. Ba
C. K
D. Al

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