Atomic Bonding Test

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Atomic Bonding Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following molecules possess incomplete octet?

A
PCl₅

B
SF₆

C
IF₇

D
BeCl₂

Solution

In the formation of a covalent bond, the atoms attain an inert gas configuration with an octet of electrons (i.e. ns²p⁶ configuration). This is known as the octet rule or the rule of eight. But, there are many covalent compounds or molecules in which the central atom, which is covalently bonded with other atoms, has less than eight electrons in its outermost shell form incomplete octet. For example, BeCl₂.
Question 2
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Which of the following is correctly arranged in the increasing order of their bond lengths?

A
C ≡ C < C = C < C – C

B
C = C < C – C < C ≡ C

C
C ≡ C < C – C < C = C

D
C – C < C = C < C ≡ C

Solution

From the above given options, option (1) is correctly arranged in the increasing order of their bond lengths.
Question 3
1 / -0

According to octet theory, during bond formation, the elements

A
tend to acquire a noble gas configuration

B
have a tendency to acquire unstable configuration

C
merely change their configuration

D
None of these

Solution

The octet rule observe that the atoms of main-group elements tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same electron configuration as a noble gas.
Question 4
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Which among the following compounds possesses molecules having both covalent and ionic bonds?

A
Sodium hydroxide (NaOH)

B
Sodium chloride (NaCI)

C
Carbon dioxide (CO₂)

D
Water (H₂O)

Solution

In NaOH, there is an ionic bonding between Na⁺ and OH^-. But there is covalent bonding between the O and H atoms of OH^- ion.
Question 5
1 / -0

Which of the following statements regarding π- bond is not true?

A
It may be formed by the overlapping of p-atomic orbitals.

B
It has no independent existence.

C
It is a weaker bond compared to σ - bond.

D
It can be formed by hybrid orbitals.

Solution

A π - bond is formed by the lateral overlap of unhybridised orbitals.
Question 6
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Which of the following statements is incorrect?

A
KCl is soluble in water.

B
HCl conducts electricity in its aqueous solution.

C
Acetic acid is soluble in water.

D
The bond formed between aluminium and fluorine is covalent.

Solution

The bond formed between aluminium and fluorine is ionic because metals form ionic bonds with non-metals.
Question 7
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Which of the following consists of a single covalent bond?

A
Cl₂

B
O₂

C
N₂

D
CO₂

Solution

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs. Among the given options, only chlorine forms a single covalent bond by sharing 1 pair of electrons between the two chlorine atoms.

O₂ and CO₂ contain double bonds and N₂ contains a triple bond in its structure.

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Atomic Bonding Test - 1

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Question 1

PCl5

SF6

IF7

BeCl2

Solution

Question 2

C ≡ C < C = C < C – C

C = C < C – C < C ≡ C

C ≡ C < C – C < C = C

C – C < C = C < C ≡ C

Solution

Question 3

tend to acquire a noble gas configuration

have a tendency to acquire unstable configuration

merely change their configuration

None of these

Solution

Question 4

Sodium hydroxide (NaOH)

Sodium chloride (NaCI)

Carbon dioxide (CO2)

Water (H2O)

Solution

Question 5

It may be formed by the overlapping of p-atomic orbitals.

It has no independent existence.

It is a weaker bond compared to σ - bond.

It can be formed by hybrid orbitals.

Solution

Question 6

KCl is soluble in water.

HCl conducts electricity in its aqueous solution.

Acetic acid is soluble in water.

The bond formed between aluminium and fluorine is covalent.

Solution

Question 7

Cl2

O2

N2

CO2

Solution

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PCl₅

SF₆

IF₇

BeCl₂

Carbon dioxide (CO₂)

Water (H₂O)

Cl₂

O₂

N₂

CO₂