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 electronegativity of elements in a period from left to right

Question # 2

SnCI2have ______ shape

Question # 3

Which of the following hydrides has the lowest boiling point?

Question # 4

The degree of polarity of molecule is known as its

Question # 5

Which of the hydrogen halides has the highest percentage of ionic character

Question # 6

The boiling point of heavy water is

Question # 7

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

Question # 8

Coordinate covalent bond is present in the molecules

Question # 9

Ionic radius, in a period from left to right

Question # 10

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

Question # 11

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

Question # 12

The structure of ICI2is

Question # 13

Nitrogen in NH3is sp3hybridized but the bond angle in NH3is 107° and not 109.5° due to

Question # 14

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

Question # 15

Which of the following species is paramagnetic?

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

Which of the following molecules have sp3hybridized carbon

Question # 20

The driving force for making a bond is

Question # 21

Which of the following molecules have multiple bonds

Question # 22

Covalent compounds are soluble in

Question # 23

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

Question # 24

Molecular orbital picture of N2 indicates

Question # 25

The shape of CIO-3according to valence shell electron pair repulsion theory will be

Question # 26

The covalent bonds are

Question # 27

Shape of CIO3is

Question # 28

Which of the following charge

Question # 29

In H2O molecule the bond angle is

Question # 30

N-atom forms three covalent bonds, its electronic configuration is

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Sr.# Question Answer
1 Which of the following has polar bond
A. O2
B. N2
C. HCl
D. Cl2
2 If two lone pairs are present then bond angle of tetrahedral compound reduces to ______ degrees
A. 109.5°
B. 107.5°
C. 104.5°
D. None
3 The ionic bonds are
A. Unidirectional
B. Bi-directional
C. Non-directional
D. Multi-directional
4 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
5 Which of the hydrogen halides has the highest percentage of ionic character
A. HCl
B. HBr
C. HF
D. HI
6 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
7 On the basis of VSEPR theory SO2is a
A. Liner molecule
B. A bent molecule
C. A strong molecule
D. A gaseous molecule
8 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
9 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
10 The number of bonds in nitrogen molecule is
11 Planar geometry of molecules is due to
A. sp3hybridization
B. sp2hybridization
C. sp hybridization
D. P - p overlap
12 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
13 Which of the following hydrides has the lowest boiling point?
A. H2O
B. H2S
C. H2S3
D. H2Te
14 H-bonding is not present in
A. Glycerine
B. Water
C. Hydrogen sulphide
D. Hydrogen fluride
15 Which of the following is a polar molecules
A. Carbon dioxide
B. Carbon tetrachloride
C. Methanol
D. Ethane
16 The formation of compounds like PF5, BCI3, SF6indicates that
A. These halides are ionic
B. These halides are covalent
C. They are Lewis acids
D. Octet rule not obeyed so the rule is not universal
17
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
18 Outer shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be
A. XY
B. X2Y
C. X2Y3
D. XY2
19 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
20 According to MO Theory, the species O2+ possesses
A. bond order of 2.5
B. three unpaired
C. diamagnetic character
D. stability lower then O2
21 The force which holds the atoms together to form a compound is called
A. A chemical bond
B. Van der waal's force
C. Dispersion force
D. London force
22 All covalent bonds formed between the two atoms are non-polar when
A. Covalent bond between two non-metal atoms
B. Covalent bond between metal and non-metal
C. Covalent bond between two atoms of same element
D. Covalent bond between metal atoms
23 The degree of polarity of molecule is known as its
A. Dipole moment
B. Moment arm
C. Bond energy
D. Ionic character
24 The covalent bonds are
A. Unidirectional
B. Bi-directional
C. Non-directional
D. Multi-directional
25 Generally electron affinities for elements in a period from left to right
A. Decreases
B. Increases
C. Remain same
D. Increases alternatively
26 The atomic radius of hydrogen is 37
A. Pecometer
B. Manometer
C. Angstrom
D. Micrometer
27 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
28 Shape of CIO3is
A. Triangular pyramidal
B. Tetrahedral
C. Triangular planar
D. Triangular bipyramidal
29 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?
A. Bond length in NO+is greater than in NO
B. Bond length in unpredictable
C. Bond length in NO+is equal to that in NO
D. Bond length in NO is greater than in NO+
30 Which of the following molecules have multiple bonds
A. CH4
B. C2H4
C. C2H6
D. CCI4

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