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Question-1
Lanthanides are extracted from
(A)
Limonite
(B)
Monazite
(C)
Magnetite
(D)
Cassiterite
Question-2
Which of the below is true about actinides?
(A)
shows higher oxidation states
(B)
higher binding energies
(C)
colourless ions
(D)
greater shielding effect
Question-3
Alloys of Lanthanides are called as
(A)
Mish-metals
(B)
Metalloids
(C)
Plate metals
(D)
Actinides
Question-4
Which is not a consequence of lanthanide contraction?
(A)
Basicity of ions
(B)
increase in ionic radii
(C)
increase in atomic number
(D)
reduced tendancy to act as reducing agent
Question-5
Maximum oxidation state exhibited by Lanthanides is
(A)
+1
(B)
+2
(C)
+3
(D)
+4
Question-6
The uncommon oxidation states exhibited by lanthanides are
(A)
+2 ,+3
(B)
+3,+1
(C)
+4 ,+2
(D)
+3,+4
Question-7
Lanthanides are separated by
(A)
Fractional distillation
(B)
Steam distillation
(C)
Fractional Crystallisation
(D)
Sublimation
Question-8
Which among the following is true?
(A)
Lanthanide ions are mostly coloured
(B)
5f shielding is greater
(C)
binding of 4f electrons is lower
(D)
Lanthanides are paramagnetic
Question-9
The electronic configuration of Actinides is
(A)
[Rn]5f
0-14
6d
0
7s
0
(B)
[Rn]5f
0-14
6d
0-2
7s
0
(C)
[Rn]5f
0-14
6d
0-2
7s
1
(D)
[Rn]5f
0-14
6d
0-2
7s
2
Question-10
Which among the following is the complete lanthanides series?
(A)
La – Lu
(B)
Ce - Lu
(C)
La – Pr
(D)
None of these
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Plus 2 Computer Science
Tamil Nadu (English Medium)
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Purification of Organic Compounds
Ether
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Atomic Structure
f - Block Elements
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