Chemistry - Transition Metals Including Lanthanides and Actinides
Exam Duration: 45 Mins Total Questions : 30
which one of the following is lanthanides element?
- (a)
Cr
- (b)
Mn
- (c)
Co
- (d)
Ce
The properties of transition elements Zr and Hf are similar because
- (a)
they possess same number of electrons
- (b)
both have similar radii
- (c)
both belong to d-block elements
- (d)
None of these
which one of the following transition elements exhibits the oxidation state of 8?
- (a)
Hf
- (b)
Ta
- (c)
W
- (d)
Ru
Increasing Paramagnetic character of dispositive ion of 29Cu, 28Ni, 27Co, 26Fe, 25Mn follow the order:
- (a)
Mn2+>Fe2+>Ni2+>Co2+>Cu2+
- (b)
Mn2+>Fe2+>Ni2+>Cu2+>Co2+
- (c)
Ni2+>Mn2+>Fe2+>Co2+>Cu2+
- (d)
Mn2+>Fe2+>Co2+>Ni2+>Cu2+
which one of the following elements does not belong to the first transition series?
- (a)
Fe
- (b)
Cr
- (c)
Ni
- (d)
Ag
The outer electronic configuration of Cu2+ is
- (a)
3d104s
- (b)
3d104s1
- (c)
3d104s2
- (d)
3d104s2
The outer electronic configuration of 58Ce is
- (a)
4f15d16s
- (b)
4f05d26s2
- (c)
4f0.5d36s2
- (d)
None of these
which one of the following transition metal iones has the least magnetic moment?
- (a)
Cr2+
- (b)
Ti2+
- (c)
V2+
- (d)
Mn2+
Which one of the following ores is used for the manufacture of potassium dichromate?
- (a)
lead chromate
- (b)
chromite
- (c)
chrome red
- (d)
chrome alum
which one of the following statements is true for K2Cr2O7?
- (a)
It is less soluble than Na2Cr2O7
- (b)
It is more stable than Na2Cr2O7
- (c)
It is orange in colour
- (d)
ALL OF THE ABOVE
which one of the following chromium compounds is used in tanning leather?
- (a)
CrCI3
- (b)
K2SO4.AI2(SO4)3.24H2O
- (c)
Cr2O3
- (d)
NONE OF THESE
The gentral electranic configuration of transition elements is
- (a)
(n-1)d1-5
- (b)
(n-1)d-10 ns1
- (c)
(n-1)d1-10 ns1-2
- (d)
NONE OF THESE
An acidified solution of potassium dichromate is treated with H2S. In the reaction, the oxidation number of chromium :
- (a)
increase from +3 to +6
- (b)
decrease from +6 to +3
- (c)
remains unchanged
- (d)
decrease from +6 to +2
Transition metal oxide, in which metal is in low oxidation state, generally exhibits the following property
- (a)
acidity
- (b)
basicity
- (c)
neutralitty
- (d)
strong oxidising property
Manganese exhibitts the most stable state in
- (a)
2
- (b)
5
- (c)
6
- (d)
7
Besides carbon the essential constituent of stainless steel is
- (a)
V
- (b)
Cr
- (c)
Mn
- (d)
Co
which one of the following alloys is used in tracer bullets?
- (a)
misch metal alloy
- (b)
pyrophoric alloys
- (c)
duralumin
- (d)
NONE OF THE ABOVE
which of the following statements concerning Lanthanide elements is false?
- (a)
Lanthanides are separated from one another by ion exchange methods
- (b)
Most characteristic oxidation state of lanthanide elements is +3
- (c)
All lanthanides are highly dense metals
- (d)
The ionic radii of trivalent lanthanides steadily increase in the atomic number
which of the following compounds is diamagnetic?
- (a)
ZncI2
- (b)
CuSO4
- (c)
NiCI4
- (d)
CrCI3
Amongst TiF2-, CoF3-, Cu2CI2 and NiCI42- (At. Nos. Ti=22, Co=27, Cu=29, Ni=28), the colourless species are :
- (a)
TiF2- and Cu2CI2
- (b)
Cu2CI2 and NiCI42-
- (c)
TiF62- and CoF62-
- (d)
CoF63- and NiCI42-
which one of the following species has green colour ?
- (a)
MnO42-
- (b)
MnO4
- (c)
Cr2O73-
- (d)
NONE OF THESE
which of the following can be used for the conversion of potassium manganate to potassium permanganate?
- (a)
O3
- (b)
electrolysis
- (c)
CI2
- (d)
ALL OF THESE
Point out the incorrect statement regarding transition elements. The have
- (a)
high m.p. and high b.p
- (b)
high densities
- (c)
high thermal and electrical conducctivity
- (d)
low tensile strength
which one of the following is not a condition for complex formation?
- (a)
variable oxidation states
- (b)
small size
- (c)
higher nuclear charge
- (d)
availability of vacant d-orbitals
d-block elements form coloured ions because, they
- (a)
absorb some energy for d-s transition
- (b)
absorb some energy d-d transition
- (c)
absorb some energy for p-d transition
- (d)
do not absorb any energy
which of the following atoms does not form interstitial compunds with transition elements?
- (a)
Pb
- (b)
C
- (c)
H
- (d)
N
The first ionisation energy of copper is higher than that of sodium because
- (a)
copper is a non-transitional elements
- (b)
d-electron have lesser screening effect
- (c)
an electron is removed from a s-orbital
- (d)
the force of attraction between the electron and nucleus in a copper atom is greater than that in a sodium atom.
The traditionl elements exhibit variables oxidate state because
- (a)
they have high ionisation energies
- (b)
penultimate d-orbitals can enter into chemical bond formation
- (c)
they are highly metallic in nature
- (d)
they are present between s and p-block elements
Silver possesses metallic lustre because
- (a)
it is a noble metal
- (b)
it is coated with oxide of silver
- (c)
valency electrons absorb and eject white light
- (d)
valency electrons absorb white light completely and no reflection
In the transition elements the incoming electrons occupies (n-1)d sub-level in preference to
- (a)
np
- (b)
ns
- (c)
(n-1)
- (d)
(n+1)
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