Chemical Bonding Test

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Chemical Bonding Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

Graphite is a soft solid lumbricant extramely difficult to melt. The reason for ths anomalous behaviour is that graphite

A
is a non-rystalline substance

B
in san allotropic form of diamond

C
has molecules of variable moleuclar masses like polymers

D
has carbon atoms arranged in large plates of rings of strongly bound carbon atoms with weak interplate bonds

Solution

C-atoms form covalently bonded plates (layers). Layers are bonded weakly together, that’s why one layer can slide over other cause lubricacy. Cannot be melted easily as larege number of atoms being bonded strongly in the layer form big entity.
Hence, option D is correct.
Question 2
1 / -0

Which of the following exists as covalent crystals in the solid state?

A
Silicon

B
Sulphur

C
Phosphorous

D
Iodine

Solution

Silicon (Si) – covalent solid
Sulphur (S₈) – molecular solid
Phosphorous (P₄) – Molecular solid
Iodine (I₂) – Molecular solid
Hence, option A is correct.
Question 3
1 / -0

The combination of atoms occur because they want -

A
To decrease number of electrons in the outermost orbit

B
To attain an inert gas configuration or to attain stability

C
To increase number of electrons in the outermost orbit

D
To attain 18 electrons in the outermost orbit

Solution

Combination of atoms occur to attain an inert gas configuration
Question 4
1 / -0

Which of the following statements is wrong regarding ionic compounds -

A
These are generally in solid state at room temperature

B
The force of attraction between ions is non-directional

C
Ionic compounds are soluble in all solvents

D
They conduct electricity in molten and solution state

Solution

Ionic compound rare soluble only in polar solvents.
Question 5
1 / -0

NH₃ and BF₃ combine readily because of the formation of -

A
a covalent bond

B
a hydrogen bond

C
a co-ordinate bond

D
an ionic bond

Solution

BF₃ is electron deficient (6e^–) compound so it accept 2e^– to attain stable configuration.
H₃N : → BF₃ (co-ordinate bond)
Question 6
1 / -0

Which cannot be explained by VBT-

A
Overlapping

B
Bond formation

C
Paramagnetic nature of oxygen

D
Shapes of molecules

Solution

Paramagnetic nature of oxygen can be explainad by M.O.T
Question 7
1 / -0

What is not true about resonance?

A
The resonating structures are hypothetical

B
The unpaired electrons in various resonating structures are same

C
Hybrid structure is most energetic

D
Hybrid structure is least energetic

Solution

Hybrid structure is least energetic (most stable).

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Chemical Bonding Test - 5

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Chemical Bonding Test - 5

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Question 1

is a non-rystalline substance

in san allotropic form of diamond

has molecules of variable moleuclar masses like polymers

has carbon atoms arranged in large plates of rings of strongly bound carbon atoms with weak interplate bonds

Solution

Question 2

Silicon

Sulphur

Phosphorous

Iodine

Solution

Question 3

To decrease number of electrons in the outermost orbit

To attain an inert gas configuration or to attain stability

To increase number of electrons in the outermost orbit

To attain 18 electrons in the outermost orbit

Solution

Question 4

These are generally in solid state at room temperature

The force of attraction between ions is non-directional

Ionic compounds are soluble in all solvents

They conduct electricity in molten and solution state

Solution

Question 5

a covalent bond

a hydrogen bond

a co-ordinate bond

an ionic bond

Solution

Question 6

Overlapping

Bond formation

Paramagnetic nature of oxygen

Shapes of molecules

Solution

Question 7

The resonating structures are hypothetical

The unpaired electrons in various resonating structures are same

Hybrid structure is most energetic

Hybrid structure is least energetic

Solution

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