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27 multiple-choice questions and answers related to chemical bonding. The questions cover topics such as the nature of chemical bonds, ionic and covalent compounds, dipole moments, hybridization, and VSEPR theory. The questions are useful for students studying chemistry at the high school or university level.
Typology: Exercises
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1. Nature of the bond formed between two elements
depends on the
(a) Oxidation potential (b) Electronegativity
(c) Ionization potential (d) Electron affinity
2. Two elements X
and Y
have following electronic
configurations
2 2 6 2 6 2
X 1 s , 2 s 2 p , 3 s 3 p , 4 s and
2 2 6 2 5
Y 1 s , 2 s 2 p , 3 s 3 p. The expected compound
formed by combination of X and Y is [BHU 1990]
(a)
2
(b)
5 2
(c)
2 5
XY (d)
5
3. Electricity do not pass through ionic compounds
(a) In solution (b) In solid state
(c) In melted state (d) None of these
4. From the following which compound on heating
readily sublimes
(a) NaCl (b)
2
MgCl
(c)
2
BaCl (d)
3
AlCl
5. Which one in the following contains ionic as well
as covalent bond [IIT 1979; CPMT 1983; DPMT 1983]
(a)
4
CH (b)
2
(c) KCN (d) KCl
6. The solution of sugar in water contains
[NCERT 1972; MP PET 2000]
(a) Free atoms
(b) Free molecules
(c) Free ions
(d) Free atoms and free molecules
7. In which of the following reactions, there is no
change in the valency [NCERT 1974; CPMT 1971, 78]
(a) KClO KClO KCl
3 4
(b) SO 2 H S 2 HO 3 S
2 2 2
(c)
2 2 4 4 2 2
BaO HSO BaSO HO
(d)
2 2
2 BaO O 2 BaO
8. The octet rule is not followed in [BHU 1981]
(a)
2
F (b) NaF
(c)
2
CaF (d)
3
9. Sodium chloride is an ionic compound whereas
hydrogen chloride is a gas because [KCET 2002]
(a) Sodium is reactive
(b) Covalent bond is weaker than ionic bond
(c) Hydrogen chloride is a gas
(d) Covalent bond is stronger than ionic bond
10. Which one of the following molecules has a
coordinate bond [CPMT 1988, 94]
(a) NH Cl
4
(b)
3
AlCl
(c) NaCl (d)
2
Cl
11. Co-ordinate bond is absent in [RPMT 2002]
(a)
4
BH (b)
2
3
CO
(c)
H O
3
(d)
4
NH
12. The dipole moment of chlorobenzene is 1.73 D.
The dipole moment of p - dichlorobenzene is
expected to be
[CPMT 1991]
(a) 3.46 D (b) 0.00 D
(c) 1.73 D (d) 1.00 D
13. Polarization of electrons in acrolein may be
written as
[IIT 1988]
(a) C H CH CH O
2
(b)
C H CH CH O
2
(c) C H CH CH O
2
(d)
C H CH CH O
2
14. The order of dipole moments of the following
molecules is
[Roorkee 2000]
(a)
3 2 2 3 4
CHCl CHCl CHCl CCl
(b)
2 2 3 3 4
CH Cl CHCl CHCl CCl
(c)
3 2 2 3 4
CH Cl CHCl CHCl CCl
(d)
2 2 3 3 4
CH Cl CHCl CHCl CCl
15. The electronegativity of C , H , O , N
and S
are 2.5,
2.1, 3.5, 3.0 and 2.5 respectively. Which of the
following bond is most polar [EAMCET 198
(a) O H (b) S H
(c) N H
(d) C H
16. Which of the following bond has the most polar
character
[DPMT 1982; CBSE PMT 1992; CPMT 1999]
(a) C O (b) C Br
(c) C S (d) C F
17. The geometry of HS
2
and its dipole moment are [IIT 1999]
(a) Angular and non-zero (b) Angular and zero
(c) Linear and non-zero (d) Linear and zero
18. How many and bonds are there in the
molecule of tetracyanoethylene
[NCERT 1980; MP PMT 1986, 95;Orissa JEE 1997]
(a) Nine and nine (b) Five and nine
(c) Nine and seven (d) Five and eight
19. The shape of
H O
3
ion is [EAMCET 1993; CPMT
2001]
(a) Linear (b) Angular
(c) Trigonal planar (d) Triangular pyramidal
20. The hybridization in sulphur dioxide is [IIT 1986;
DPMT 1990]
(a) sp
(b)
3
sp
(c)
2
sp (d)
2
dsp
21. The number and type of bonds between two
carbon atoms in
2
CaC
are [IIT 1996]
(a) One sigma ( )and one pi ( )bonds
(b) One sigma ( )and two pi ( )bonds
(c) One sigma ( )and one and a half pi ( )bonds
(d) One sigma ( )bond
22. Which of the following resonating structures of
2
is the most contributing [Roorkee Qualifying 1998]
(a) N N O (b) N N O
(c) N N O (d) N N O
23. The hybridization of atomic orbitals of nitrogen in
2
3
NO , and
4
NH are [IIT Screening 2000]
(a)
3
sp , sp and
2
sp respectively
(b)
2
sp , sp and
3
sp respectively
(c) sp , sp
2
and
3
sp respectively
(d)
2 3
sp , sp and sp respectively
24. The molecule having one unpaired electron is
[IIT 1985; MP PMT 1989]
(a) NO (b) CO
(c)
CN (d)
2
25. The geometry of , 3
ClO according to valence shell
electron pair repulsion (VSEPR) theory will be
[KCET 1996; MP PET 1997]
(a) Planar triangle (b) Pyramidal
(c) Tetrahedral (d) Square planar
26. Which of the following halogens has the highest
bond energy [CPMT 1988]
(a)
2
(b)
2
Cl
(c)
2
Br (d)
2
27. What bond order does
2
2
O have [Pb. PMT 2001]
(a) 3 (b) 2
(c) 1 (d) 1/
28. In the process, O O e
2
2 2
the electron lost is
from
[Orissa JEE 2002]
(a) Bonding -orbital (b) Antibonding -orbital
(c)
z
2 p
orbital (d)
x
2 p
orbital
29. The maximum number of hydrogen bonds formed
by a water molecule in ice is
[MP PET 1993; AFMC 2002;UPSEAT 1999, 2001, 02]
(a) 4 (b) 3
(c) 2 (d) 1
30. Hydrogen bonding is not present in
[AIIMS 1998; MP PET/PMT 1998]
(a) Glycerine
(b) Water
(c) Hydrogen sulphide
(d) Hydrogen fluoride
31. The bonds in [ ( )]
4 6
K FeCN are [EAMCET 199
(a) All ionic
(b) All covalent
(c) Ionic and covalent
(d) Ionic, covalent and coordinate covalent
32. In which of the following ionic, covalent and
coordinate bonds are present [UPS
(a) Water
(b) Ammonia
(c) Sodium cyanide
(d) Potassium bromide
molecule is tetrahedrally attached with other
water molecule.
30. (c) Hydrogen bonding is present in molecules
which have F , O, or N atoms.
31. (d) Structure of [ ( )] 4 6
K FeCN is
4
4
C N
C N
C N
C N
Fe
C N
C N
K
32. (c) Sodium cyanide contain ionic, covalent and
coordinate bond.