S and P Block Elements Test

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S and P Block Elements Test - 7

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Weekly Quiz Competition

Question 1
1 / -0

Which halogen acid is a liquid –

A
HF

B
HCl

C
HBr

D
HI

Solution

In HF, due to high electronegativity difference between hydrogen and fluorine atoms, hydrogen bonds are present between them. Due to strong hydrogen bonds, HF exists in liquid state at room temperature. However, in HCl, HBr and HI, hydrogen bonds are missing due to low electronegativity differences between hydrogen and halogen atoms, hence, they are present in gaseous state at room temperature.
Question 2
1 / -0

Hydracids have no action on litmus when they are –

A
In contact with water

B
Dry

C
Fused with each other

D
Mixed together and dissolved in water

Solution

Hydracids have no action on litmus when they are dry due to lack of dissociation of Hydracids in H⁺
Question 3
1 / -0

Which of the following acids is most stable –

A
HIO

B
HClO₃

C
HIO₃

D
HBrO₃

Solution

HIO₃ is most stable due to higher covalent character due to larger sizer of I
Question 4
1 / -0

Cl₂O is an anhydride of –

A
HClO₄

B
HOCl

C
Cl₂O₃

D
HClO₂

Solution

Cl₂O is anhydride of HOCl
Cl₂O + H₂O → 2HOCl
Question 5
1 / -0

The most powerful oxidant among the following is

A
HClO

B
HClO₂

C
HClO₃

D
HClO₄

Solution

Lower the oxidation state of chlorine, higher will be the oxidising power of its oxyacid. In HClO the oxidation state of chlorine is the least, so it will have the highest oxidising power among the given oxyacids.
Question 6
1 / -0

Which one of the following is the correct statement?

A
Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase

B
B₂H₆.2NH₃ is known as ‘inorganic benzene’

C
Boric acid is a protonic acid

D
Beryllium exhibits coordination number of six

Solution

Borazine (inorganic benzene) is B3N3H6

Boric acid is a lewis acid

Beryllium exhibits a coordination number of 4 or 2, but never 6
Question 7
1 / -0

Hypochlorous acid readily decomposes into –

A
Cl₂, H₂and O₂

B
HCl and H₂O

C
HCl and O₂

D
Cl₂, HCl and O₂

Solution

Hypochlorous acid is stable in solution
2HOCl → 2HCl + O₂
Question 8
1 / -0

Similarity of fluorine and oxygen may not be attributed to –

A
Their atomic and ionic radii are closely similar

B
The atom of both elements are restricted to an octet of electrons in their valence shell

C
Both of them are highly electronegative elements

D
Both form stable pπ-pπ multiple bonds with themselves

Solution

Fluorine atoms do not form pπ-pπ multiple bonds with themselves while oxygen atoms formed pπ-pπ multiple bonds with themselves.

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S and P Block Elements Test - 7

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S and P Block Elements Test - 7

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Question 1

HF

HCl

HBr

HI

Solution

Question 2

In contact with water

Dry

Fused with each other

Mixed together and dissolved in water

Solution

Question 3

HIO

HClO3

HIO3

HBrO3

Solution

Question 4

HClO4

HOCl

Cl2O3

HClO2

Solution

Question 5

HClO

HClO2

HClO3

HClO4

Solution

Question 6

Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase

B2H6.2NH­3 is known as ‘inorganic benzene’

Boric acid is a protonic acid

Beryllium exhibits coordination number of six

Solution

Question 7

Cl2, H2 and O2

HCl and H2O

HCl and O2

Cl2, HCl and O2

Solution

Question 8

Their atomic and ionic radii are closely similar

The atom of both elements are restricted to an octet of electrons in their valence shell

Both of them are highly electronegative elements

Both form stable pπ-pπ multiple bonds with themselves

Solution

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HClO₃

HIO₃

HBrO₃

HClO₄

Cl₂O₃

HClO₂

HClO₂

HClO₃

HClO₄

B₂H₆.2NH₃ is known as ‘inorganic benzene’

Cl₂, H₂and O₂

HCl and H₂O

HCl and O₂

Cl₂, HCl and O₂