Chemical Bonding & Molecular Structure Test

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Chemical Bonding & Molecular Structure Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

Minimum ionic character is shown by ___________.

A
FeCl₂

B
SnCl₂

C
AlCl₃

D
MgCl₂

E
None of these

Solution

It is correct. It has the maximum charge, smaller size of cation, larger size of anion. So, least ionic character.
Question 2
1 / -0

Iodine heptafluoride has a structure of ___________.

A
square pyramid

B
trigonal bipyramid

C
octahedral

D
pentagonal bipyramid

E
none of these

Solution

Here sp³d³ hybridisation will occur forming pentagonal bipyramid structure by 7 orbitals.
Question 3
1 / -0

Xeon has maximum number of lone pairs in ___________.

A
XeO₃

B
XeF₄

C
XeF₆

D
XeF₂

E
Both 2 and 4

Solution

XeF₂has 3 lone pairs- maximum.
Question 4
1 / -0

CaC₂ is associated with which types of bonds?

A
One sigma and two pi

B
One sigma and one pi

C
Two sigma and one pi

D
Two sigma and two pi

E
None of these

Solution

Carbide ion is C₂^2-and is structured with two carbons with triple bond, i.e. one sigma, two pi.
Question 5
1 / -0

Which of the following has the shortest bond length?

A
O₂²⁺

B
O₂⁺

C
O₂^-

D
O₂^2-

E
O₂

Solution

High bond order => Short bond length
Bond order = 3
Question 6
1 / -0

Which of the following options represents isoelectronic species?

A
C₂^2-, O^2-, CO, NO

B
NO⁺, C₂^2-, CN^-, N₂

C
CN^-, N₂ , O₂^2-, CO₂^2-

D
N₂, O₂^-, NO⁺, CO

E
None of these

Solution

All have 14 electrons. So, they are isoelectronics.
Question 7
1 / -0

Which of the following have the same bond length?

A
CN^- and NO⁺

B
CN^- and CN⁺

C
O^2-and CN^-

D
NO⁺and CN⁺

E
None of these

Solution

Same bond length means same bond order. Both CN^- and NO⁺have bond order of 3.
Question 8
1 / -0

Diamagnetism is shown by _________.

A
O₂^2-

B
O₂⁺

C
O₂

D
NO

E
None of these

Solution

Correct option. This species has 18 electrons, which are filled in such a way that all molecular orbitals are fully filled, so diamagnetic.
Question 9
1 / -0

In which of the following is the strongest hydrogen bond present?

A
O-H....N

B
F-H....F

C
O-H....O

D
O-H....F

E
None of these

Solution

Fluorine has the highest electronegativity and thus, has the strongest bond.
Question 10
1 / -0

Bond angle of one hundred nine degree and twenty eight minutes is found in _________.

A
NH₃

B
H₂O

C
C⁺H_⁵

D
N⁺H₄

E
None of these

Solution

It has an bond angle of 109^o 28'. tetrahedral structure, sp³hybridised.
Question 11
1 / -0

Energy of lattice of compounds having charge on them (i.e. ions) depends on __________.

A
packing of ions only

B
size of ion only

C
charge and size of ion

D
charge on the ion only

E
none of these

Solution

Greater the charge and smaller the radius, greater the polarising power and thus, greater the covalent nature. This leads to increase in lattice energy.
Question 12
1 / -0

P₄O₁₀has ______ number of P-O bonds.

A
17

B
16

C
15

D
6

E
None of these

Solution

Number of P-O bonds in is P₄O₁₀16.
Question 13
1 / -0

In which of the following compounds is bond angle found to be the smallest?

A
SO₂

B
OH₂

C
SH₂

D
NH₃

E
None of these

Solution

Bond angle of SH₂is 90^o_,which is the smallest among the following.
Question 14
1 / -0

Which of the following compounds is present in the tetrahedral structure?

A
XeF₄

B
SF₄

C
BF₄^-

D
[Ni(CN)₄]^2-

E
None of these

Solution

BF₄^- has a regular tetrahedral structure.
Question 15
1 / -0

Number of lone pairs in Xenon difluoride, Xenon tetrafluoride and Xenon hexafluoride are _________.

A
3, 2, 1

B
2, 4, 6

C
1, 2, 3

D
6, 4, 2

E
None of these

Solution

XeF₂ in first exited form is 5s² 5p⁵ 5d¹, i.e. 3 lone pairs. Similarly XeF₄ has 2 lone pairs and XeF₆ has 1 lone pair.

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Chemical Bonding & Molecular Structure Test - 5

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Chemical Bonding & Molecular Structure Test - 5

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Question 1

FeCl2

SnCl2

AlCl3

MgCl2

None of these

Solution

Question 2

square pyramid

trigonal bipyramid

octahedral

pentagonal bipyramid

none of these

Solution

Question 3

XeO3

XeF4

XeF6

XeF2

Both 2 and 4

Solution

Question 4

One sigma and two pi

One sigma and one pi

Two sigma and one pi

Two sigma and two pi

None of these

Solution

Question 5

O22+

O2+

O2-

O22-

O2

Solution

Question 6

C22-, O2-, CO, NO

NO+, C22-, CN-, N2

CN-, N2 , O22-, CO22-

N2, O2-, NO+, CO

None of these

Solution

Question 7

CN- and NO+

CN- and CN+

O2- and CN-

NO+ and CN+

None of these

Solution

Question 8

O22-

O2+

O2

NO

None of these

Solution

Question 9

O-H....N

F-H....F

O-H....O

O-H....F

None of these

Solution

Question 10

NH3

H2O

C+H5

N+H4

None of these

Solution

Question 11

packing of ions only

FeCl₂

SnCl₂

AlCl₃

MgCl₂

XeO₃

XeF₄

XeF₆

XeF₂

O₂²⁺

O₂⁺

O₂^-

O₂^2-

O₂

C₂^2-, O^2-, CO, NO

NO⁺, C₂^2-, CN^-, N₂

CN^-, N₂ , O₂^2-, CO₂^2-

N₂, O₂^-, NO⁺, CO

CN^- and NO⁺

CN^- and CN⁺

O^2-and CN^-

NO⁺and CN⁺

O₂^2-

O₂⁺

O₂

NH₃

H₂O

C⁺H_⁵

N⁺H₄

SO₂

OH₂

SH₂

NH₃

XeF₄

SF₄

BF₄^-

[Ni(CN)₄]^2-