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Recent questions tagged general principle
+3
votes
1
answer
On doping Ge metal with a little of In or Ga, we get
asked
Apr 3, 2019
in
Class 12
by
kratos
neet
processes of isolation of elements
class-11
upsee
solid state
class-10
general principle
class-12
periodic classification of elements
+3
votes
1
answer
Name the impurities ******* as anode mud during electrolytic refining of copper.
asked
Apr 3, 2019
in
JEE
by
kratos
processes of isolation of elements
processes of isolation of metals
jee
general principles
general principle
jee mains
class-12
metallurgy
+3
votes
1
answer
Halide ores present in the following : Bauxite, Calamine, Galena, Cryolite, Copper glance, Cinnabar.
asked
Apr 2, 2019
in
Class 12
by
kratos
metals and nonmetals
processes of isolation of elements
class-10
general principle
icse
bseb model set
class-12
+2
votes
1
answer
Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?
asked
Mar 31, 2019
in
Class 12
by
kratos
neet
class-12
general principle
processes of isolation of elements
+3
votes
1
answer
Name one chief ore each of copper and aluminium. Name the method used for concentration of these two ores.
asked
Mar 30, 2019
in
Class 12
by
kratos
class-12
general principle
metallurgy
processes of isolation of elements
+3
votes
1
answer
Why can"t aluminium be reduced by carbon ?
asked
Mar 30, 2019
in
Class 12
by
kratos
neet
cbse
processes of isolation of elements
general principle
class-12
+1
vote
1
answer
Write two basic requirements for refining of a metal by Mond process and by Van Arkel Method.
asked
Mar 27, 2019
in
Class 12
by
kratos
neet
processes of isolation of elements
aiims
jee mains 2019
general principle
class-12
general principles
+2
votes
1
answer
How are metals used as semiconductors refined? What is the principle of the method used?
asked
Mar 26, 2019
in
Class 12
by
kratos
cbse
processes of isolation of elements
methods of extraction
general principle
class-12
+2
votes
1
answer
What is pyrometallurgy ? Explain with one example.
asked
Mar 25, 2019
in
Class 12
by
kratos
processes of isolation of elements
cbse
general principles
general principle
class-12
+1
vote
1
answer
Which of the following pairs of metals is purified by van Arkel method? (a) Zr and Ti (b) Ga and In (c) Ni and Fe (d) Ag and Au
asked
Mar 23, 2019
in
Class 12
by
kratos
neet
processes of isolation of elements
general principles
aiims
jee mains 2019
general principle
class-12
metallurgy
+2
votes
1
answer
"Metals are usually not found as nitrates in their ores." Out of the following two (I and II)
asked
Mar 20, 2019
in
Class 12
by
kratos
neet
processes of isolation of elements
general principles
general principle
class-12
+2
votes
1
answer
name the mineral ore from which aluminium is extracted . why is it gaining importance ? give its distribution in India
asked
Mar 17, 2019
in
Class 12
by
kratos
metals and nonmetals
processes of isolation of elements
cbse
class-10
general principle
class-12
minerals and energy resources
process of isolation of elements
+3
votes
1
answer
Why is the reduction of a metal oxide easier if metal formed is in liquid state at the temperature of reduction ?
asked
Mar 17, 2019
in
Class 12
by
kratos
cbse
processes of isolation of elements
methods of extraction
general principle
class-12
metallurgy
+3
votes
1
answer
Consider the following metallurgical process: (A) Heating the sulphide ore in blast furnace
asked
Mar 15, 2019
in
JEE
by
kratos
processes of isolation of elements
jee
mineral based industries of india
material technology
general principle
general scince
jee mains
class-10
class-12
+2
votes
1
answer
Although thermodynamically feasible in practice magnesium metal is not used for the reduction of alumina. Why?
asked
Mar 9, 2019
in
Class 12
by
kratos
cbse
processes of isolation of elements
general principles
general principle
class-12
+1
vote
1
answer
Although thermodynamically feasible in practice magnesium metal is not used for the reduction of alumina. Why?
asked
Mar 7, 2019
in
Class 12
by
kratos
cbse
processes of isolation of elements
general principles
general principle
class-12
+1
vote
1
answer
Which of the following set of metals mostly found as sulphide ores :
asked
Mar 5, 2019
in
Class 12
by
kratos
metals and nonmetals
neet
processes of isolation of elements
aiims
class-10
general principle
class-12
+1
vote
1
answer
In the Froth Floatation process, zinc sulphide and lead sulphide can be separated by ______________.
asked
Mar 4, 2019
in
Class 12
by
kratos
neet
processes of isolation of elements
cbse
general principles
general principle
class-12
+2
votes
1
answer
Cinnabar is – A. PbS B. HgS
asked
Mar 2, 2019
in
Class 12
by
kratos
metals and nonmetals
processes of isolation of elements
class-10
general principle
bseb model set
class-12
+1
vote
1
answer
Formation of metallic copper from the sulphide ore in the commercial thermo-metallurgical process essentially involves
asked
Mar 1, 2019
in
Class 12
by
kratos
metals and nonmetals
cbse
processes of isolation of elements
class-10
general principle
class-12
bitsat
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