Chemical Bonding Test

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Chemical Bonding Test - 7

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following complex ions violates the EAN rule ?

A
[Fe(CO)₅]

B
Ni(CO)₄

C
[Fe(CN)₆]^4–

D
[Mn(H₂O)₆]²⁺

Solution

In Mn(H₂O)₆]²⁺ (Z = 25 for Mn), oxidation number of Mn =+2
∴ EAN = (25 – 2) + 6 × 2 = 35
This value does not correspond to the atomic number of any noble gas.
So the EAN rule is violated.
Hence, option D is correct.
Question 2
1 / -0

Which of the following statements regarding VI A group hydrides are correct

A
All element of this group form volatile hydrides.

B
Except H₂O all other hydrides are poisonous and have unpleasant odours.

C
They are all very weak acids and there is an increase in acidic strength from H₂O to H₂Te.

D
All of these.

Solution

All element of this group form volatile hydrides. Except H₂O all other hydrides are poisonous and have unpleasant odours. Hydrides of group VI are very weak acids and there is an increase in acidic strength from H₂O to H₂Te.
Question 3
1 / -0

The maximum covalency for p-block elements is equal to -

A
The number of unpaired p-electrons

B
The number of paired d-electrons

C
The number of unpaired s-and p-electrons

D
The actual number of s-and p-electrons in the outermost shell

Solution

Maximum covalency = s-&.p electrons in the outermost shell
Question 4
1 / -0

Out of following which one has maximum ionic character -

A
NaCl

B
KCl

C
CaCl₂

D
MgCl₂

Solution

Due to larger size of Potassium it has least degree of polarization so it has maximum ionic character.

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Re-Attempt Weekly Quiz Competition

Chemical Bonding Test - 7

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Chemical Bonding Test - 7

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Question 1

[Fe(CO)5]

Ni(CO)4

[Fe(CN)6]4–

[Mn(H2O)6]2+

Solution

Question 2

All element of this group form volatile hydrides.

Except H2O all other hydrides are poisonous and have unpleasant odours.

They are all very weak acids and there is an increase in acidic strength from H2O to H2Te.

All of these.

Solution

Question 3

The number of unpaired p-electrons

The number of paired d-electrons

The number of unpaired s-and p-electrons

The actual number of s-and p-electrons in the outermost shell

Solution

Question 4

NaCl

KCl

CaCl2

MgCl2

Solution

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[Fe(CO)₅]

Ni(CO)₄

[Fe(CN)₆]^4–

[Mn(H₂O)₆]²⁺

Except H₂O all other hydrides are poisonous and have unpleasant odours.

They are all very weak acids and there is an increase in acidic strength from H₂O to H₂Te.

CaCl₂

MgCl₂