Entry Test Preparation 2015, Chemistry BOOK 1 Chapter # 5 Chemical Bonding , MCQS with Answer Key
Entry Test Preparation 2015
Chemistry
Chapter # 5
CHEMICAL BONDING
You are given following questions from the topic, with four
choices A through D. Select the choice that will answer the question best.
1. Hydrogen
chloride molecule contains
A. Covalent bond B. Double
bond
C. Co-ordinate bond D. Electrovalent
bond
2. Which of the
following geometry is associated with the compound in which the central atom
assumes sp3d hybrdization?
A. Planar B. Pyramidal
C. Angular D. Trigonal bipyrmidal
3. Outermost
shells of two elements X and Y have two and six electron respectively. If they
combine, the expected formula of compound will be
A. XY B. X2Y
C. X2Y3 D. XY2
4. The bond
angle H – O – H in ice is closet to
A. 120o .
B. 60o
C. 90o D. 109o
5. XeF4 has
shape of
A. Sphere B. Trigonal bipyramidal
C. Tetrahedral D. Square
planar.
6. Which of the
following phenomena will occur when two atoms of the elements having same spin
of electron approach for bonding?
A. Orbital overlap will not occur B. Bonding will not occur
C. Both (A) and (B) are correct D. Non
of the above are correct
7. A molecule
in which sp2 hybride orbitals are used by the central atom in forming covalent
bonds is
A. He2 B. SO2
C. PCl5 D. N2
8. Which of the
following species is paramagnetic?
A. CO2 B. O2
C. O2- D. CN-
9. Which of the
following hydrides has the lowest boiling point?
A. H2O B. H2S
C. H2Te D. H2S3
10. The number of
antibonding electrons in O molecular ion
on the basis of MOT is
A. 4 B. 3
C. 2 D. 5
11. Antibonding
MO is formed by
A. Addition of atomic orbitals
B. Substraction
of atomic orbitals
C. Multiplication of atomic orbitala
D. None of
these.
12. Shape of
CO2 is
A. Triangular pyramidal B. Tetrahedral
C. Triangular planar D. Triangular
bipyramidal
13. Which of the
following has zero dipole moment?
A. ClF B. CHCl3
C. SiF4 D. CFCl3
14. Which carbon
is more electronegative?
A. sp3-hybridized carbon
B. sp-hybridized
carbon
C. sp2-hybridized carbon
D. always same irrespective of its hybride
state
15. In CCl4, the
four valencies of carbon are directed towards the corners of a
A. Cube B. Hexagon
C. Prism D. Tetrahedron
16. The equation
for the first ionization energy of hydrogen is
A. H(g)
H + e B. H2(g) 2H +
2e
C. H2(g)
H + e D. H(g) +
e H
17. The equation
M M+
+ e represents
A. second ionization energy of element M
B. first ionization energy of elements
C. first ionization energy of ion M+
D. electron affinity of element M
18. The shape of
methonal, ammonia and water molecule can be explained by assuming
A. sp3 hybridization B. sp2
hybridization
C. sp hybridization D. all
of these
19. Which for the
following has no dipole moment
A. HCl B. H2S
C. H2O D. CO2
20. Which of the
hydrogen halides has the highest percentage of ionic character?
A. HCl B. HBr
C. HF D. Hl
21. Noble gases
have the electronic configuration with their valance shell ns2np6 except one
A. He B. Ne
C. Kr D. Xe
22. Two H-atom
combine to form a strong H2 molecule due to
A. increase in potential energy B. decrease
in potential energy
C. energy remains unchanged D. distance
in increased
23. Increase in
atomic number in a period from left to right will affect the size of the atom
in a way that
A. atomic radii decreases B. atomic radii increase
C. no change in the atomic radii
D. atomic radii decrease alternatively
24. Ca, Mg, Be,
Ba, belong to the same group, the order of their ionization energy values is
A. Be > Mg > Ca > Ba B. Ba > Ca > Mg > Be
C. Ca > Mg > Be > Ba D. Ba > Mg > Ca > Be
25. Which of the
following is isolelectronic with krpton
A. Ca++ B. Al+++
C. Br-1 D. I-1
26. Range of
electronegavitity values 0 to 4. The highest electronegative atom is
A. oxygen B. nitrogen
C. carbon D. fluorine
27. An ionic
compound M2S3 is formed by the metal M, the metal is
A. Ca B. Ba
C. K D. Al
28. Which of the
following has polar bond
A. O2 B. N2
C. HCl D. Cl2
29. Which of the
following molecules have multiple bonds
A. CH4 B. C2H4
C. C2H6 D. CCl4
30. In H2O molecule
the bond angle is
A. 90o B. 109.5o
C. 107o D. 104.5o
31. The three N –
H & bonds are made by
A. sp3 – s overlap B. sp2 – s overlap
C. P – p overlap D. sp
- overlap
32. B-atom in BF3
has
A. sp3 hybridization B. sp2 hybridization
C. sp hybridization D. no
hybridization
33. Which of the
following has two bonds
A. CH4 B. C2H4
C. C2H2 D. CCl4
34. &-bond is
stronger bond than bond because
A. &-bond has electron density outside
the nuclei
B. -bond has
electron density along the axis between nuclei
C. &-bond has electron density
concentrated between the nuclei
Where has zero electron density
D. &-bond is
made by parallel overlap of atomic orbital
35. The theory
which states that covalent bond is formed by the overlapping of two or more
than two half filled atomic orbitals is
A. M.O. theory B. V.B.
theory
C. VSEPR theory D. none
of these
36. s-character
in hybrid orbital shows
A. sp3 hybridization B. sp2
hybridization
C. sp-hybridization D. d2sp2
hybridization
37. Hydrogen
bonding is maximum in
A. Ethyl chloride B. Diethyl
ether
C. Ethanol D. Non of the above
38. Two H-atoms
joined together by a covalent bond forming hydrogen molecule which have equal
A. electron affinity B. electronegativity
C. both A & B D. none
of the above
39. Lewis
electron dot symbol of chlorine isccccc
A. B.
C. D. All of these
40. This Lewis dot symbol is for which of
the following atoms
A. Sodium B. Oxygen
C. Nitrogen D. Flourine
41. Which of the
following sets of atoms are arranged in their order of increasing
electronegativity
A. B < F < N B. F
< N < B
C. B < N < F D. F
< B < N
42. In which of
the following is the angle between the two covalent bonds greatest?
A. CO2 B. CH4
C. NH3 D. H2O
43. A particular
element has the following electronic configuration 1s22s22p5 , In its chemical
reactions. It is most likely to
A. loose 1 electron B. lose
7 electrons
C. gain 1 electron D. loose 3 electrons
44. In diatomic
molecule, in which atoms have identical electronegativities, sharing of the
bonding electrons between the two atoms is
A. unequal sharing B. equal
sharing
C. no sharing D. none
of the above
45. Which of the
following compound is covalent
A. H2 B. KCl
C. MgO D. NaCl
46. In the triple
bond of acetylene, the following bonds are present
A. 1 sigma & 2 Pi bonds B. 2
sigma & 1 Pi bonds
C. 3 sigma bonds D. 2
Pi bonds
47. Dipole moment
of CO2 is zero. Hence the bond angle in CO2 is
A. 109.5o B. 90o
C. 180o D. 120o
48. The bond
formed in fluorine molecule is due to
A. s – s overlapping B. s
– p overlapping
C. p – p overlapping D. p
– s overlapping
49. Hybridization
involves
A. bond pairs B. Ione
pairs
C. both A & B D. none
of these
50. An element
‘A’ has electronic configuration 1s2 2s2 2p6 3s1 combines with element ‘B’
which has electronic configuration 1s2 2s2 2p6 3s2 3p5 . The bond between ‘A’
and ‘B’ is
A. ionic B. covalent
C. co-ordinate D. metall
ANSWER KEY
(CHEMICAL
BONDING)
|
1
|
A
|
2
|
D
|
3
|
A
|
|
4
|
D
|
5
|
D
|
6
|
C
|
|
7
|
B
|
8
|
B
|
9
|
B
|
|
10
|
A
|
11
|
B
|
12
|
C
|
|
13
|
C
|
14
|
B
|
15
|
D
|
|
16
|
A
|
17
|
A
|
18
|
A
|
|
19
|
D
|
20
|
C
|
21
|
A
|
|
22
|
B
|
23
|
A
|
24
|
A
|
|
25
|
C
|
26
|
D
|
27
|
D
|
|
28
|
C
|
29
|
B
|
30
|
D
|
|
31
|
A
|
32
|
B
|
33
|
C
|
|
34
|
C
|
35
|
A
|
36
|
C
|
|
37
|
C
|
38
|
C
|
39
|
D
|
|
40
|
C
|
41
|
C
|
42
|
A
|
|
43
|
C
|
44
|
B
|
45
|
A
|
|
46
|
A
|
47
|
C
|
48
|
C
|
|
49
|
C
|
50
|
A
|
|
|
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