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Question-1
Copper gets covered with a green layer due to
(A)
Heat
(B)
presence of CO
2
(C)
Moisture
(D)
Both b and c
Question-2
Gold found in native or mixed form scattered in sand and gravel is called as
(A)
Alluvial gold
(B)
Placer gold
(C)
Vein gold
(D)
None of these
Question-3
Silver is not affected by the action of
(A)
Chlorine
(B)
Concentrated acid
(C)
Alkalies
(D)
Dilute acids
Question-4
Transition elements are classified into how many series?
(A)
3
(B)
4
(C)
5
(D)
6
Question-5
The highest oxidation state shown by any transition metal is
(A)
+5
(B)
+6
(C)
+7
(D)
+8
Question-6
Diamagnetic character arises because of the
(A)
absence of unpaired electrons
(B)
presence of unpaired electrons
(C)
absence of paired electrons
(D)
none of these
Question-7
In the extraction of Cu, the reaction which does not take place in the Bessemer converter is
(A)
2CuFeS
2
+ O
2
→Cu
2
S + FeS + SO
2
(B)
2Cu
2
S + 3O
2
→2Cu
2
O + 2SO
2
(C)
2Cu
2
O + Cu
2
S →6Cu + SO
2
(D)
2FeS + 3O
2
→2FeO + 2SO
2
Question-8
All transition elements exhibit variable valencies because of having
(A)
catalytic property
(B)
(n-1)d and ns electrons
(C)
3 outermost shell electrons
(D)
none of these
Question-9
Copper is extracted from
(A)
cuprite
(B)
copper glance
(C)
malachite
(D)
copper pyrites
Question-10
Which of the following is also called Vein gold?
(A)
Gold mixed with quartz in ancient rocks
(B)
Gold scattered in sand and gravel
(C)
Gold in alluvial sand
(D)
Native gold
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Plus 2 Biology Science
Tamil Nadu (English Medium)
Practice in Related Chapters
Periodic Classification - II
f - block Elements
d - block Elements
Atomic Structure
Coordination Compounds and Bio-coordination Compounds
p - Block Elements
Biomolecules
Electrochemistry
Chemical Kinetics
Surface Chemistry
Carbolic Acids
Chemistry in Action
Hydroxy Deratives
Isomerism in Organic Chemistry
Nuclear Chemistry
Termodynamics-II
Solid State II
Chemical Equilibrium-II
Purification of Organic Compounds
Ether
Carbonyl Compounds
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