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d and f Block Elements MCQ

d and f Block Elements Chemistry

d and f Block Elements Important Questions

Question 1
Which of the following is ferromagnetic
A
W
B
Co
C
Cr
D
Mn
Question 2
What is the name of element with atomic number 105?
A
Holmium
B
Nobelium
C
Dubnium
D
Kurchatovium
Question 3
In acidic medium one mole of MnO4accepts how many moles of electrons in a redox process ?
A
3
B
1
C
5
D
6
Question 4
Paramagnetism is exhibited by molecules
A
Containing only paired electrons
B
Carrying unpaired electrons
C
Carrying a positive charge
D
Not attracted in a magnetic field
Question 5
The equivalent weight of potassium permanganate for acid solution is
A
52.16
B
79
C
158
D
31.6
Question 6
Most powerful oxidizing property of manganese is shown by which of the following oxidation state
A
Mn(+4)
B
Mn(+2)
C
Mn(+5)
D
Mn(+7)
Question 7
Which one of the following is highest melting halide?
A
Agl
B
AgBr
C
AgF
D
AgCl
Question 8
Transition metals are related to which block

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A
p-block
B
s-block
C
d-block
D
None of these
Question 9
While extracting an element from its ore, the ore is ground and leached with dilute KCN solution to form the soluble product potassium argentocyanide. The element is
A
Manganese
B
Silver
C
Lead
D
Chromium
Question 10
To obtain steel entirely free from sulphur and phosphorus, the process used is
A
Open-hearth process
B
Electrothermal process
C
Bessemer process
D
Duplex process
Question 11
Zinc when reacted with excess of NaOH gives
A
Zinc oxide
B
Di sodium zincate
C
Zinc hydroxide
D
Sodium zincate
Question 12
Effective magnetic droment of Sc+3 ion is
A
2.83
B
1.73
C
5.92
D
0
Question 13
Variable valency is shown by
A
Typical elements
B
Transition elements
C
None of these
D
Normal elements
Question 14
The term platforming is
A
Platinum painting
B
Flat sheet of platinum
C
Platinum manufacturing
D
Platinum used as a catalyst
Question 15
The highest oxidation state of Cr will be
A
2
B
4
C
3
D
6
Question 16
The metal which is the best conductor of electricity is

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A
Copper
B
Aluminium
C
Silver
D
Iron
Question 17
Which of the following metals will not react with a solution of CuSO4?
A
Mg
B
Hg
C
Zn
D
Fe
Question 18
The atomic radii from Cr to Cu is almost identical because of
A
All of these
B
Increased screening effect to nullify increased nuclear charge
C
Repulsion among increased electrons
D
Increasing nuclear charge from Cr to Cu
Question 19
Silver nitrate is mainly used
A
As dehydrating agent
B
In model formation
C
As reducing agent
D
In photography
Question 20
Variable valency is shown by
A
Cu
B
Al
C
Na
D
Mg
Question 21
Which of the following pair of transitional elements exhibit highest and lowest density?
A
Os and Ir
B
Os and Pt
C
Hg and Sc
D
Os and Sc
Question 22
Which of the following transition metal is present in misch metal?
A
Cr
B
La
C
Sc
D
Ni
Question 23
Which of the following statements is correct about equivalent weight of KMnO4?

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A
It is one third of its molecular weight in alkaline medium
B
It is one third of its molecular weight in acidic medium
C
It is one fifth of its molecular weight in alkaline medium
D
It is equal to its molecular weight in acidic medium
Question 24
Zn and Hg belong to the same group, they differ in many of their properties. The property that is shared by both is
A
They react with hot sodium hydroxide
B
They form oxide readily
C
They react with steam readily
D
They react with hot concentrated sulphuric acid
Question 25
The most stable oxidation state of Mn is
A
+4
B
+5
C
+7
D
+2
Question 26
Permanent magnet is made from
A
All of these
B
Wrought Iron
C
Steel
D
Cast iron
Question 27
One mole of potassium dichromate completely oxidises the following number of moles of ferrous sulphate in acidic medium

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A
3
B
5
C
6
D
1
Question 28
The number of unpaired electrons in Mn+3 is
A
3
B
2
C
4
D
Zero
Question 29
Which is most reactive metal?
A
Ni
B
Fe
C
Pt
D
Co
Question 30
While writing the formula of ferrous oxide it is written as (FeO), because it is
A
Paramagnetic
B
Ferromagnetic
C
Non-existant
D
Non-stoichiometric
There are 30 questions to complete.
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Vishal Arora

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