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

Which of the following species has unpaired electrons in antibonding molecular orbitals

Question # 2

Ionic radius, in a period from left to right

Question # 3

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

Question # 4

Which of the following geometry is associated with the compound in which the central atom assumes sp3d hybridization?

Question # 5

When of the following is isolelectronic with krypton

Question # 6

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

Question # 7

If two lone pairs are present then bond angle of tetrahedral compound reduces to ______ degrees

Question # 8

Hydrogen chloride molecule contains

Question # 9

Atomic number of Al is 13. When it forms ionic bond with oxygen the number of electrons lost by 1 Al atom is

Question # 10

Covalent compounds are soluble in

Question # 11

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

Question # 12

Which of the following charge

Question # 13

Water H2O is liquid while hydrogen sulphide H2S is a gas beause

Question # 14

Which is made by coordinate covalent bond

Question # 15

The nature of interparticle forces in benzene is

Question # 16

The geometry of 4 sp3hybrid orbitals on an atom is

Question # 17

Which of the following hydrides has the lowest boiling point?

Question # 18

Which of the following has polar bond

Question # 19

An ionic compound M2S3is formed by the metal M,, the metal is

Question # 20

Three sp2hybrid are co-planar at an angle of

Question # 21

Maximum hydrogen bonds in water are

Question # 22

The shape of the molecule SF2Cl2is

Question # 23

Electronegativity values of the elements F, CI and Br vary

Question # 24

B-atom in BF3has

Question # 25

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

Question # 26

The driving force for making a bond is

Question # 27

Which of the following species is paramagnetic?

Question # 28

According to VSEPR theory, the shape of the water molecule is

Question # 29

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

Question # 30

Shielding effect intervening electrons causes

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Sr.# Question Answer
1 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
2 Shape of CIO3is
A. Triangular pyramidal
B. Tetrahedral
C. Triangular planar
D. Triangular bipyramidal
3 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
4 Three sp2hybrid are co-planar at an angle of
A. 104.5°
B. 109.5°
C. 107°
D. 120°
5 Which of the following has highest bond order
A. Choice 1
B. Choice 2
C. Choice 3
D. Choice 4
6 Antibonding MO is formed by
A. Addition of atomic orbitals
B. Substraction of atomic orbitals
C. Multiplication of atomic orbitals
D. None of these
7 Planar geometry of molecules is due to
A. sp3hybridization
B. sp2hybridization
C. sp hybridization
D. P - p overlap
8 Which of the following species has unpaired electrons in antibonding molecular orbitals
A. Choice 1
B. Choice 2
C. Choice 3
D. Choice 4
9 Atomic number of Al is 13. When it forms ionic bond with oxygen the number of electrons lost by 1 Al atom is
A. 1
B. 2
C. 3
D. 4
10 Which of the following molecules have multiple bonds
A. CH4
B. C2H4
C. C2H6
D. CCI4
11 The Electro-negatively difference for ionic bond must be greater than
A. 1.6
B. 1.7
C. 1.8
D. 1.0
12 The nature of interparticle forces in benzene is
A. Dipole-dipole interaction
B. Dispersion force
C. Ion-dipole interaction
D. H-bonding
13
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
14 Hydrogen chloride molecule contains
A. Covalent bond
B. Double bond
C. Co-ordinate bond
D. Electrovalent bond
15 The geometry of 4 sp3hybrid orbitals on an atom is
A. Square planar
B. Tetrahedral
C. Trigonal planar
D. Linear
16 Which of the following has unchanged valency?
A. H
B. Na
C. Fe
D. Oxygen
17 Which carbon is more electronegative?
A. sp3- hybridized carbon
B. sp-hybridized carbon
C. sp2-hybridized carbon
D. always same irrespective of its hybrid state
18 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
19 The bond angles in methane CH4are equal to
A. 109.5°
B. 107.5°
C. 104.5°
D. 120°
20 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
21 Which of the following hydrides has the lowest boiling point?
A. H2O
B. H2S
C. H2S3
D. H2Te
22 The electron affinity of chlorine may be represented by the equation
A. Choice 1
B. Choice 2
C. Choice 3
D. Choice 4
23 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
24 One of the following bonds is polar but compound is non-polar
A. H2O
B. NH3
C. HCl
D. CO2
25 Generally ionization energy of atoms decreases by
A. Decreases in atomic size
B. Increase in atomic size
C. Increase in nuclear charge
D. None of these
26 Covalent compounds are soluble in
A. Polar solvents
B. Non-polar solvents
C. Concentrated acids
D. All solvents
27 The bond angle depends upon the
A. Types of bonds
B. Number of bonds
C. Non-bonding electron pairs
D. All of the above
28 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
29 According to VSEPR theory, the shape of the water molecule is
A. Octahedral
B. Distorted tetrahedral
C. Planar triangle
D. Linear
30 Tripple bond is present in
A. O2
B. H2
C. N2
D. Cl2

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