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

Shielding effect intervening electrons causes

Question # 2

The bond angles in methane CH4are equal to

Question # 3

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

Question # 4

Inter molecular forces in solid hydrogen are

Question # 5

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

Question # 6

Elements have the tendency to attain 8 electrons in their valence shell. This is known as

Question # 7

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

Question # 8

The bond order O2molecule is

Question # 9

The shape of methanol, ammonia and water molecule can be explained by assuming

Question # 10

The geometry of 4 sp3hybrid orbitals on an atom is

Question # 11

The ionic bonds are

Question # 12

Antibonding MO is formed by

Question # 13

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

Question # 14

The driving force for making a bond is

Question # 15

On the basis of VSEPR theory SO2is a

Question # 16

In which of the following theories the hybridizationis considered

Question # 17

The number of bonds in nitrogen molecule is

Question # 18

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

Question # 19

The number of electron pairs shared in carbon tetrachloride molecule is

Question # 20

The equation for the first ionization energy of hydrogen is

Question # 21

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

Question # 22

Question Image
Question # 23

Mg becomes isoelectronic with neon when it

Question # 24

The bond angle depends upon the

Question # 25

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

Question # 26

Generally ionization energy of atoms decreases by

Question # 27

Which of the following charge

Question # 28

Number of sigma bonds in P4O10is

Question # 29

The shape of gaseous SnCl2is

Question # 30

Which of the following hydrides has the lowest boiling point?

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Sr.# Question Answer
1 The structure of ICI2is
A. Trigonal
B. Trigonal bipyramidal
C. Octahedral
D. Square planar
2 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
3 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
4 Which of the following species is paramagnetic?
A. CO2
B. NO
C. O2-
D. CN
5 Two H-atom combine to form a strong H2molecule due to
A. Increase in potential energy
B. Decrease in potential energy
C. Energy remains unchanged
D. Distance is increased
6 Size of an anion is increased as compared to its atom because of the
A. Addition of new shell
B. Repulsion of electrons in the valence shell
C. Decrease in nuclear charge
D. Increase in the unclear charge
7 N-atom forms three covalent bonds, its electronic configuration is
8 Three sp2hybrid are co-planar at an angle of
A. 104.5°
B. 109.5°
C. 107°
D. 120°
9 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
10 When elements of group I react with the elements of group VIA theory form
A. Ionic bond
B. Covalent bond
C. Polar bond
D. None
11 The number of bonds in nitrogen molecule is
12 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
13 One of the following bonds is polar but compound is non-polar
A. H2O
B. NH3
C. HCl
D. CO2
14 The shape of the molecule SF2Cl2is
A. Trigonal bipyradmidal
B. Cubic
C. Octahedral
D. Tetrahedral
15 The three N - Hσ-bonds are made by
A. sp3- s overlap
B. sp2- s overlap
C. P - p overlap
D. sp - overlap
16 Number of sigma bonds in P4O10is
A. 6
B. 7
C. 17
D. 16
17 Tripple bond is present in
A. O2
B. H2
C. N2
D. Cl2
18 The most suitable method of the separation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1: 1 is
A. Distrillation
B. Crystallization
C. Vapourisation
D. Colour spectrum
19 Generally electron affinities for elements in a period from left to right
A. Decreases
B. Increases
C. Remain same
D. Increases alternatively
20 On the basis of VSEPR theory SO2is a
A. Liner molecule
B. A bent molecule
C. A strong molecule
D. A gaseous molecule
21 The overlapping of two partially filled atomic orbital is in such a way that the probability of finding the electron pair is maximum along the axis joining the two nuclei, the bond is
A. Sigma bond
B. Pi bond
C. Ionic bond
D. Non-polar bond
22 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
23 Atoms obey octet rule by sharing-electrons making covalent bonds according to
A. Lewis and Kossal theory
B. Valance bond theory
C. VSEPR theory
D. Molecular orbital theory
24 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
25 The ionic bonds are
A. Unidirectional
B. Bi-directional
C. Non-directional
D. Multi-directional
26 Planar geometry of molecules is due to
A. sp3hybridization
B. sp2hybridization
C. sp hybridization
D. P - p overlap
27 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
28 The covalent bonds are
A. Unidirectional
B. Bi-directional
C. Non-directional
D. Multi-directional
29 When of the following is isolelectronic with krypton
A. Ca++
B. Al+++
C. Br-1
D. I-1
30 Which of the following is a polar molecules
A. Carbon dioxide
B. Carbon tetrachloride
C. Methanol
D. Ethane

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