Chemical Bonding and Molecular Structure: MCQs | Question – Paper 2 7


Topic: Chemical Bonding and Molecular Structure, Test No.: 02, Total MCQs: 15

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Question 1
The state of hybridization of the central atom and the number of lone pairs over the central atom in POCl3 are [WB JEE 2012]
A
sp, 0
B
sp2, 0
C
sp3, 0
D
dsp2, 1
Question 2
NiCl2{P(C2H5)2(C6H5)}2 exhibits temperature dependent magnetic behaviour (paramagnetic/diamagnetic). The coordination geometries of Ni2+ in the paramagnetic and diamagnetic states are respectively [IIT JEE 2012]
A
tetrahedral and tetrahedral
B
square planar and square planar
C
tetrahedral and square planar
D
square planar and tetrahedral
Question 3
When O2 is converted into O2+ [Karnataka CET 2011]
A
both paramagnetic character and bond order increase
B
bond order decreases
C
paramagnetic character increases
D
paramagnetic character decreases and the bond order increases
Question 4
Which one of the following conversions involve change in both hybridization and shape? [Karnataka CET 2010]
A
NH3 NH4+
B
CH4 C2H6
C
H2O H3O+
D
BF3 BF4
Question 5
Assuming that Hund's rule is violated, the bond order and magnetic nature of the diatomic molecule B2 is [IIT JEE 2010]
A
1 and diamagnetic
B
0 and diamagnetic
C
1 and paramagnetic
D
0 and paramagnetic
Question 6
Based on VSEPR theory, the number of 90 degree F — Br — F angles in BrF5 is [IIT JEE 2010]
A
0
B
2
C
4
D
8
Question 7
The species having pyramidal shape is [IIT JEE 2010]
A
SO3
B
BrF3
C
SiO32–
D
OSF2
Question 8
The value of n in the molecular formula BenAl2Si6O18 is [IIT JEE 2010]
A
3
B
5
C
7
D
9
Question 9
Using MO theory predict which of the following species has the shortest bond length? [AIEEE 2009]
A
O2+
B
O2
C
O22–
D
O22+
Question 10
The number of nodal planes present in s * s antibonding orbitals is [Karnataka CET 2008]
A
1
B
2
C
0
D
3
Question 11
Which metal has a greater tendency to form metal oxide? [Karnataka CET 2008]
A
Cr
B
Fe
C
Al
D
Ca
Question 12
Which one of the following constitutes a group of the isoelectronic species? [AIEEE 2008]
A
B
C
D
Question 13
Which one of the following pairs of species have the same bond order? [AIEEE 2008]
A
CN and NO+
B
CN and CN+
C
O2 and CN
D
NO+ and CN+
Question 14
For a stable molecule the value of bond order must be [Karnataka CET 2007]
A
negative
B
positive
C
zero
D
there is no relationship between stability and bond order
Question 15
In acetylene molecule, between the carbon atoms there are [Karnataka CET 2007]
A
three sigma bonds
B
two sigma and one pi bonds
C
one sigma and two pi bonds
D
three pi bonds
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