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Hydrogen Bond
1.
The states of hybridization of boron and oxygen atoms in boric acid
2.
(A) sp3 and sp2
(B) sp2 and sp3
(C) sp2 and sp2
(D) sp3 and sp3
The correct order of the hybridization of the central atom in the
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following species NH3, [PtCl4]2–, PCl5 and BCl3
3.
co
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(H3BO3) are respectively
[2001]
(A) dsp2, dsp3, sp2 and sp3
(B) sp3, dsp2, dsp3, sp2
(C) dsp2, sp2, sp3, dsp3
(D) dsp2, sp3, sp2, dsp3
Specify the coordination geometry around and hybridization of N and B
atoms in a 1: 1 complex of BF3 and NH3
[2002]
(A) N: tetrahedral, sp3; B: tetrahedral, sp3
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(B) N: pyramidal, sp3; B: pyramidal, sp3
(C) N: pyramidal, sp3; B: planar, sp2
The linear structure is assumed by:
.s
a
4.
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(D) N: pyramidal, sp3: tetrahedral, sp3
(A) SnCl2
(C) CO2
(D) NO2
Which of the following statements are correct?
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5.
(B) NH3
[1991]
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(A) The bond angle of NCl3 is greater than that of NH3.
(B) The bond angle in PH3 is greater than that of PF3.
(C) And are isostructural
(D) It is not necessary that in TBP structure the lone pairs always would
occupy the equatorial positions.
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5.
7.
The geometry of H2S and its dipole moment are
[1999]
(A) Angular and non-zero
(B) Angular and zero
(C) Linear and non-zero
(D) Linear and zero
The bond order in NO is 2.5 while that in NO+ is 3. Which of the
(A) Bond length in NO+ is equal to that in NO
(B) Bond length in NO is greater than in NO+
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(C) Bond length in NO+ is greater than in NO
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following statements is true for these two species?
(D) Bond length is unpredictable
8.
Which of the following molecules/ions does not contain unpaired
electrons?
(A) N2+
9.
(B) O2
(C) O22–
(D) B2
The cyanide ion, CN– and N2 are isoelectronic. But in contrast to CN–,
N2 is chemically inert, because of
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(A) Low bond energy
[1992]
ks
(B) Absence of bond polarity
(C) Unsymmetrical electron distribution
.s
a
(D) Presence of more number of electrons in bonding orbitals
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10. Among KO2, AlO2–, BaO2 and NO2+, unpaired electron is present in
[1997]
(B) KO2 and AlO2–
(C) KO2 only
(D) BaO2 only
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(A) NO2+ and BaO2
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11. The correct order of increasing C—O bond length of CO, CO32–, CO2 is
[1999]
a) CO32–  CO2  CO
b) CO2  CO32–  CO
c) CO CO32–  CO2
d) CO CO2  CO32–
[2001]
co
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12. The common features among the species CN–, CO and NO+ are
a) Bond order three and isoelectronic
b) Bond order three and weak field ligands
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c) Bond order two and -acceptors
d) Isoelectronic and weak field ligands
13. Which of the following are isoelectronic and isosteructural? NO3–, CO32–
, SO3
a) NO3–, CO32–
b) SO3, NO3–
c) ClO3–, CO32–
d) CO32–, SO3
14. Among the following, the paramagnetic compound is
b) O3
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a) Na2O2
[2007]
c) N2O
d) KO2
15. The species having bond order different from that in CO is
b) NO+
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a) NO–
c) CN–
.s
a
16. Planar structure is shown by
a) CO32–
b) BCl3
[2003]
[2007]
d) N2
[AIIMS2007]
c) N(SiH3 )3
d)All
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17. Which of the following does not have a co –ordinate covalent bond?
a) SO2
[CPMT2008]
b) H N O3
c) H2 SO3
d) HNO2
18. In which of the following, the central atob does not have Sp3
hybridisation?
a. CH4
[AIPMT2010]
b. SF4
c. BF4–
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d. NH4+
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19. Which of the following is Linear?
a. XeF4
[AFMC2008]
b. XeF2
c. SO2
d. ClF3
20. Among the following molecules, SO2, ClF3, XeF4, SF4 Which of the
following does not describe the shape of any of these is
The shape of NH 2 molecule is
a. Pyramidal
22.
23.
c. See-saw
b. Linear
The shape of I F5 is
(CPMT 2000: AIIMS2001)
c. Tetrahedral
a. Pentagonal bipyramidal
b. Square pyramidal
c. Octahedral
d. Trigonal planar
The As F5 molecule is trigonal pyramidal The hybrid orbital used
a. d x  y , s, p y , pz
2
2
d. d xy , s , px , p y , pz
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.s
a
a. H 2O
b. NH 3
[JIPMER 2001]
c. CH 4
d. CO2
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BCl3 is a planar molecule because its hybridization is:
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a. SP 3
27.
2
Ion which of the following the angle between the two covalent bonds is
greatest?
26.
2
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2
(AIIMS2000)
b. s , px , p y , pz , d z
2
c. d x  y , d z , s, px , p y
25.
d. Trigonal
(CPMT2001)
by the As-atom for bonding are
24.
d. T-shape
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21.
b. Trigonal bi pyramidal
co
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a. Bent
[AIPMT2011]
b. Sp 3d
c. Sp 2
[BHU 2000]
d. Sp
The ratio of  and  bonds in benzene is
[BHU 2000]
a. 1:3
d. 1:9
b. 1:4
c. 1:6
Which of the following molecules will form a linear polymeric structure
due to hydrogen bonding?
a. NH 3
b. H 2O
[AIPMT 2000]
c. HCl
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d. HF
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Which of the following is not a paramagnetic?
b. N 2
a. NO
Which of the following two are isostructural? [AIPMT 2001][BHU 2007]
a. XeF2 , IF2
30.
b. NH 3 , BF3
b. NH 4
c. PCl3
Which of the following has p  d bonding?
a. No3
32.
c. CO32  , SO32  d. PCl5 , ICI5
In which of the following bond angle is maximum? [AIPMT 2001]
a. NH 3
31.
d. O 2
c. CO
b. So32 
c. Bo33
co
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29.
[AIPMT 2000]
d. SCl2
[AIPMT 2002]
d. Co32 
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28.
The number of  and  -bonds present in 1-buten-3-yne are
[AFMC 2000]
a. 7  and 5 
33.
b. 6  and 4 4
c. 6  and 6 
d. 7  and 3 
Both BF3 and NF3 are covalent but BF3 molecule is non-polar while
NF3 is polar because
[AFMC 2001]
a. Boron is a metal while nitrogen is a gas
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b. BF3 is a planar but NF3 is pyramidal
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c. Atomic size of boron is smaller than nitrogen
d. B-F bond has no dipole moment while N-F bond has dipole moment
NH 3 is added to BF3 by
.s
a
34.
b. Covalent bond
c. Dative bond
d. Molecular bond
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a. Ionic Bond
[AFMC 2001]
Ionic bond formation between Aand B can take place only if
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35.
[AFMC 2001]
a. Ionization energy of A is less and electron affinity of B is more.
b. If ionisation energy of both A and B are more.
c. Both have equal electron affinities.
d. None of the above.
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37.
Ethane molecule contains
a. One  -bond and five  -bonds
b. Two  -bonds only
c. Two  -bonds and four  -bonds
d. Four  -bonds and  -bonds
Which of the following species is diamagnetics?
b. O 2
a. O2
39.
c. O 
2
d. O 
2
2
MO configuration of He2 is
[AMU 2001]
a.  1s 2 1s 2 2s1
b.  1s 2 1s 2 2s 2
c.  1s 2 1s1 2s 2
2
1
1
d.  1s  1s  2s
The orbitals of same energy level providing the most efficient
overlapping are
[PMT (HARYANA) 2000]
b. sp 2  sp 2
a. sp-sp
40.
[AMU 2001]
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38.
[AMU 2000]
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36.
c. sp 3  sp 3
d. All of the these
What is the correct sequence of bond order?
[PMT (HARYANA) 2000; BHU 2004]
c. O2  O2  O2
d. O2  O2  O2
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b. O2  O2  O2
The number of SP 3 - hybrid carbons in 2- butyne is
42.
b. 2
c. 3
.s
a
a. 1
[PMT (HARYANA) 2001]
ks
41.
a. O2  O2  O2
Anti bonding molecular orbital is formed by
d. 4
(DPMT 2000)
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a. Addition of wave function of atomic orbitals
b. Subtraction of wav e functions of atomic orbitals.
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c. Multiplication of wave function of atomic orbitals
d. None of the above
43.
In Lewis formula of O3 there are
2000)
a. 2  , 1  , 4 lone pairs
b. 1  , 2  ,, 1 lone pairs
c. 2  , 2  , 3 lone pairs
d. 2  , 1  , 6 lone pairs
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(DPMT
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44.
2
The number possible resonating structures for CO3 ion is
[PMT (MP) 2000]
a. 9
[PMT (KERALA) 2001]
b. H 2O  NH 3  CO2  CH 4
C. H 2O  NH 3  CH 4  CO2
d. CO2  CH 4  NH 3  H 2O
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a. H 2O  NH 3  CH 4  CO2
In OF2 , number of bond pairs and lone pairs of electrons are
respectively
[DPMT 2002]
a. 2, 6
47.
d. 2
The correct order of bond angles in the molecule H 2O , NH 3 , CH 4 and
CO2 is
46.
c. 3
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45.
b. 6
b. 2, 8
c. 2, 10
d. 2, 9
Which of the following does not contain coordinate bond?
[PMT (RAJASTHAN) 2002]
a. BH 4
c. CO32 
dissociate into the constituent atoms?
c. N  N bond in N 2
d. O  O Bond in O2
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b. C  H Bond in CH 4
The ONO angle is maximum in
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a. NO3
b. NO2
[AIIMS 2004]
c. NO2
Which statement is true for N 3 ion?
d. NO2
[AIIMS 2004]
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50.
[PMT (KERALA) 2003]
a. H  H bond in H 2
.s
a
49.
d. H 3O 
Which of the following bonds requires the largest amount of energy to
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48.
b. NH 4
a. It has a non – linear structure
b. It is called pseudohalogen
c. The average oxidation state of N in the ion is -1
d. It is isoelectronic with NO2
51.
Among the following, the pair in which two species are not isostructural
is
[AIIMS 2004]
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b. IO3 and XeO3
c. BH 4 and NH 4
d. PF6 and SF6
In regular octahedral molecule MX 6 , the number of XMX bonds at
1800 is
[AIPMT 2004]
a. 3
53.
b. 2
c. 6
d. 4
H 2 O is dipolar whereas BeF2 is not, It is because
a. electro negativity of F is greater than that of O
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52.
a. SiF4 and SF4
[AIPMT 2004]
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b. H 2O involves H – bonding whereas BeF2 is a discrete unit
c. H 2O is linear and BeF2 is angular
d. H 2O is angular and BeF2 is linear
54.
In BrF3 molecule, the lone pairs occupy equatorial position around Br
atom to minimize.
a. Lone Pair – bond pair repulsions only
b. Lone Pair – lone pair repulsions only[AIPMT 2004]
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c. Bond Pair – bond pair repulsions only
55.
Which hybridizations has sulphur in SO2 ? [PMT (HARYANA) 2003]
.s
a
a. sp 2
b. sp 3d 2
c. sp 3
[PMT(HARYANA)2005]
a. sp , sp 3 and sp 2
b. sp , sp 2 and sp 3
c. sp 2 , sp and sp 3
d. sp 2 sp 3 and sp
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57.
d. sp
The hybridizations of nitrogen in NO2 , NO3 and NH 4 are respectively
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56.
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d. Lone Pair – bond pair as well as lone pair – lone pair repulsions
The correct sequence of hybridization of methane, ethane and acetylene
is
[CPMT 2003]
a. sp 2 , sp 3 , sp b. sp , sp 2 , sp 3
58.
c. sp 3 , sp 2 , sp
Hybridizations present in CIF3 is
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d. sp 3 , sp , sp 2
[CPMT 2005]
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b. sp 3
a. s 2 d 2
Electron deficient molecule is
a. CCI 4
60.
d. sp 3d
[CPMT 2005]
b. PCl5
c. BF3
d. SF6
The number of  and  bonds in Allyl Isocyanide are
co
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59.
c. dsp 2
[CH2= CH- CH2:-NC]
b. 9  , 9 
c. 3  , 4 
d. 5  , 7 
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a. 9  , 3 
[CPMT 2006]
KEY
2)b
4) c
5)c
11) d
12) a
13) a 14) d
21) a
22) b
23) b
6) a
24) d
7) d
15) a 16) d 17) d
25) c
26) b
27) d
8) c
9) b
10) c
18) a
19) b
20) b
28) c
29) a 30) b
32) d
33) b
34) c
35) a
36) a 37) b
38) a 39) a 40) a
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31) b
.s
a
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3) a
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1) a
43) d
44) c
45) d
46) b
47) c
48) c 49) d 50) b
53) d
54) d
55) a 56) b
57) c
58) d 59) c 60) a
42) b
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41) 2
51) a
52) a
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