Chemical Bonding & Molecular Structure Test

Result

Chemical Bonding & Molecular Structure Test - 50

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Weekly Quiz Competition

Question 1
4 / -1

The distribution of electrons in the molecular orbitals of the O₂ molecule is as follows

A

B

C

D

Solution
Question 2
4 / -1

NH₃ has a much higher boiling point that PH₃ because

A
NH₃ has larger molecular weight

B
NH₃ undergoes umbrella inversion

C
NH₃ forms hydrogen bond

D
NH₃ contains ionic bonds whereas PH₃ contains covalent bonds.
Question 3
4 / -1

The element X of group VA combines with the element Y of group VIA. The resulting compound may have the formula

A
X₂Y₃

B
X₅Y₆

C
X₃Y₂

D
X₆Y₅
Question 4
4 / -1

The dielectric constant of H₂O is 80. The electrostatic force of attraction between Na⁺ and Cl^- will be

A
reduced to 1/40 in water than in air

B
reduced to 1/80 in water than in air

C
will be increased to 80 in water than in air

D
will remain unchanged
Question 5
4 / -1

Which of the following does not have a tetrahedral structure ?

A
BH₄

B
BH₃

C

D
H₂O
Question 6
4 / -1

The weakest among the following types of bonds is

A
ionic

B
covalent

C
metallic

D
H-bond
Question 7
4 / -1

Which of the following pairs will form the most stable ionic bond ?

A
Na and Cl

B
Mg and F

C
Li and F

D
Na and F
Question 8
4 / -1

Linus Pauling received the Nobel prize for his work on

A
atomic structure

B
photosynthesis

C
chemical bonds

D
thermodynamics
Question 9
4 / -1

The distance between the two adjacent carbon atoms is largest in

A
Benzene

B
Ethene

C
Butane

D
Ethyne
Question 10
4 / -1

Which of the following statements is not correct ?

A
Hybridisation is the mixing of atomic orbitals prior to their combining into molecular orbitals

B
sp² - hybrid orbitals are formed from two p-atomic orbitals and one s–atomic orbital

C
dsp² – hybrid orbitals are all at 90º to one another

D
d²sp³ – hybrid orbitals are directed towards the corners of a regular octahedron.