Chemical Bonding and Molecular Structure: MCQs | Question – Paper 6

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Topic: Chemical Bonding and Molecular Structure, Test No.: 06, Total MCQs: 10

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Question 1
Which one of the following pairs of molecules will have permanent dipole moments for both members?
A
SiF4 and NO2
B
NO2 and CO2
C
NO2 and O3
D
SiF4 and CO2
Question 2
In which of the following molecules/ions are all the bonds are not equal?
A
SF4
B
SiF4
C
XeF4
D
BF4−
Question 3
Which of the following molecules/ions does not contain unpaired electrons?
A
O22–
B
B2
C
N2+
D
O2
Question 4
An atom of an element A has three electrons in its outermost orbit and that of B has six electrons in its outermost orbit. The formula of the compound between these two will be
A
A3 B6
B
A2 B3
C
A3 B2
D
A2 B
Question 5
Which one of the following has the regular tetrahedral structure?

(Atomic numbers B = 5, S = 16, Ni = 28, Xe = 54)

A
XeF4
B
SF4
C
BF4–
D
[Ni(CN)4]2–
Question 6
Which of the following is not tetrahedral?
A
BF4–
B
NH4+
C
CO32–
D
SO42–
Question 7
Which of the following statement is correct?
A
The number of electrons present in the valence shell of S in SF6 is 12.
B
The rates of ionic reactions are very slow.
C
According to VSEPR theory, SnCl2 is the linear molecule.
D
The correct order of ability to form ionic compounds among Na+, Mg2+ and Al3+ is Al3+ > Mg2+ > Na+
Question 8
Which of the following is not correct regarding the properties of ionic compounds
A
Ionic compounds have high melting and boiling points.
B
Their reaction velocity in aqueous medium is very high.
C
Ionic compounds in their molten and aqueous solutions do not conduct electricity.
D
They are highly soluble in polar solvents.
Question 9
Which one of the following is a correct set?
A
H2O, sp3, angular
B
H2O, sp2 , linear
C
NH4+, dsp2, square planar
D
CH4, dsp2, tetrahedral
Question 10
In the anion HCOO– the two carbon–oxygen bonds are found to be of equal length. What is the reason for it?
A
Electronic orbitals of carbon atom are hybridised
B
The C= O bond is weaker than the C – O bond
C
The anion HCOO– has two resonating structures
D
The anion is obtained by removal of a proton from the acid molecule
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