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Online Tests
ECAT Chemistry Chapter 17 Transition Elements Online Test MCQs With Answers
Question # 1
The elements in which d or f-orbitals are incomplete are called
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Transition elements
Typical elements
Actinides
lanthanides
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Question # 2
Which element has 4 unpaired electrons in 3d-orbital
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Chromium - 24
Manganese - 25
Iron - 26
Cobalt - 27
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Question # 3
Which alloy contains 50% copper, 25% zinc and 25% nickel
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German silver
Gun metal
Bell metal
Brass
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Question # 4
f-Block elements are also called
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Non typical transition elements
Outer transition elements
Normal transition elements
Inner transition elements
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Question # 5
Which of the following is a typical transition metal
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Sc
Y
Ra
Co
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Question # 6
The colour of transition metal complexes is due to
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d-d transitions of electrons
Para magnetic nature of transition elements
Ionization
Loss of s-electrons
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Question # 7
Bronze is an alloy which contains
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60% cu
70% cu
80% cu
99% cu
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Question # 8
Transition elements form which type of bond
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Ionic bonds only
Covalent bonds only
Ionic and covalent bonds
Polar bonds
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Question # 9
Bell metal is an alloy of
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Cu, Zn, and Sn
Cu, Zn and Ni
Cu and Zn
Cu and Sn
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Question # 10
Maximum variable oxidation state is of:
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Mn
+2
Fe
+3
Cr
+1
a and b
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Question # 11
Which of the following is a non-typical transition elements
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Cr
Mn
Zn
Fe
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Question # 12
The coordination number of iron in [Fe(H
2
O)
6
]
3+
is
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2
3
4
6
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Question # 13
Coordination number of Pt in [PtCl (NO
2
) (NH
3
)
4
]
2-
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2
-
4
1
6
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Question # 14
Rusting of iron is catalysed by
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Fe
O
2
Zn
H
+
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Question # 15
In the electronic configuration of Cr one electron from 4s sub-shell is transfered to 3d sub-shell because
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The 3rd orbital is of lower energy than 4s
The 4s orbital is of equal energy to 3d orbital
The half filled d-subshell is more stable than incomplete d-sub shell
6 unpaired electrons make Cr more paramagnetic
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Question # 16
Which of the following is not correct about transition metals?
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Their melting and boiling points are high
Their compounds are generally coloured
They can form ionic or covalent compounds
They do not exhibit variable valency
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Question # 17
During oxidation in k
2
Cr
2
O
7, Cr VI changes to :
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I
II
III
IV
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Question # 18
The percentage of carbon in different types of iron products is in the order of
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Cast iron > wrought iron > steel
Wrought iron > steel > cast iron
Cast iron > steel > wrought iron
Cast iron = steel > wrought iron
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Question # 19
Which metal is used for catalytic hydrogenation of oils
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Cu
Pt
Ni
Pd
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Question # 20
d-block elements closely resemble in their physical and chemical properties. Which statement is incorrect
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They show variable valency
Their ions and compounds are coloured
They are good conductors of heat and electricity
Their compounds are diamagnetic
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Question # 21
Which element belong to 5d series
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V
Nb
Pd
Hf
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Question # 22
Which of the following d-block elements can show the highest oxidation number in its compounds
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Chromium
Copper
Nickel
Manganese
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Question # 23
Coordination number of Pt in [Pt Cl(NO
2
) (NH
3
)]
2-
is
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2-
4
1
6
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Question # 24
f-block elements are called :
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Alkali metal
Alkakline earth metals
Transition elements
Electron deficient elements
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Question # 25
The number of unpaired electrons in Mn
2+
is
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5
4
3
2
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Question # 26
The formula of curprite is
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Cu
2
S
Cus
Cu
2
O
CuCO
3
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Question # 27
Content of carbon in steel is:
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0.12 to 0.25%
0.25% to 2.5%
3.0 to 3.5%
4.0 to 4.5%
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Question # 28
Bessemer converter is used in the manufacture of
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Pig iron
Steel
Wrought iron
Cast iron
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Question # 29
Besides Zn and Cu , German silver contains the metal
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Sn
Ag
Ni
Mg
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Question # 30
CuSO
4
. 5H
2
O is used to prepare
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Transition complex
Fehling's 'A' sol
Fehling's 'B' sol
Fehling's sol
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Question # 31
In physical and chemical properties, transition elements show
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Similarities
Dissimilarities
Both of these
Somestimes similarities, sometimes dissimilarities
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