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Recent questions tagged metallurgy
+3
votes
1
answer
'M' is an element which is out of Cu, Fe, Al, Na. It shows the following properties:
asked
Apr 7, 2019
in
Class 10
by
kratos
metals and nonmetals
cbse
class-10
icse
metallurgy
+1
vote
1
answer
Chlorine can be manufactured from (A) Electrolysis of NaCl (B) Electrolysis of brine
asked
Apr 7, 2019
in
JEE
by
kratos
jee
acids bases and salts
class-10
jee mains
class-12
halogens family
metallurgy
+1
vote
1
answer
A metal ‘X’ has a valency 2 and a non-metal ‘Y’ has a valency 3. Write an equation to show how ‘Y’ forms an ion.
asked
Apr 5, 2019
in
Class 10
by
kratos
class-10
icse
metallurgy
+3
votes
1
answer
The ore zinc blende, is an important source of the metal zinc. What is the name of the zinc compound in zinc blende ?
asked
Apr 5, 2019
in
JEE
by
kratos
jee
class-10
icse
jee mains
class-12
metallurgy
+2
votes
1
answer
Which of the following reactions represents the self-reduction process? (D) All of these
asked
Apr 4, 2019
in
JEE
by
kratos
class-12
jee
jee mains
metallurgy
+1
vote
1
answer
Write the principle of Vapour phase refining.
asked
Apr 4, 2019
in
JEE
by
kratos
cbse
processes of isolation of elements
jee
methods of extraction
jee mains
class-12
metallurgy
+2
votes
1
answer
In the extractive metallurgy of iron from haematite ore, lime stone is added during smelting. Explain why.
asked
Apr 4, 2019
in
JEE
by
kratos
jee
class-10
icse
jee mains
metallurgy
+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
+2
votes
1
answer
The position of some metals in the electrochemical series in decreasing electropositive character is Mg > Al > Zn > Cu > Ag.
asked
Apr 1, 2019
in
Chemistry
by
kratos
electrochemistry
cbse
redox reaction
injso
icse
class-10
class-12
metallurgy
+1
vote
1
answer
Select correct statement (A) In the decomposition of an oxide into oxygen and gaseous metal,
asked
Mar 31, 2019
in
JEE
by
kratos
jee
class-10
icse
jee mains
class-12
metallurgy
+1
vote
1
answer
The impurity present in the mineral is called
asked
Mar 31, 2019
in
Class 12
by
kratos
neet
processes of isolation of elements
aiims
some basic principles and techniques
bseb model set
class-12
metallurgy
+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
+2
votes
1
answer
Explain why it is preferable to use a number of graphite electrodes as anode instead of a single electrode, during the above electrolysis.
asked
Mar 30, 2019
in
Class 10
by
kratos
electrolysis
class-10
icse
metallurgy
+2
votes
1
answer
The main ore used for the extraction of iron is : (A) Haematite
asked
Mar 29, 2019
in
JEE
by
kratos
jee
class-10
icse
jee mains
metallurgy
+2
votes
1
answer
Why we add cryolite or fluorspar in alumina during Hall’* Heroults process?
asked
Mar 29, 2019
in
Chemistry
by
kratos
cbse
surface chemistry
general principles
processes of isolation of metals
jee
class-10
icse
jee mains
class-12
metallurgy
+1
vote
1
answer
(i) State the reason for addition of caustic alkali to bauxite ore during purification of bauxite.
asked
Mar 28, 2019
in
JEE
by
kratos
jee
class-10
icse
jee mains
periodic classification of elements
p - block element
metallurgy
+3
votes
1
answer
Give the ionization reactions of electrolyte used in Hall’* process.
asked
Mar 28, 2019
in
Class 10
by
kratos
periodic classification of elements
class-10
icse
metallurgy
+3
votes
1
answer
What would you observe When carbon monoxide is passed over heated copper oxide.
asked
Mar 28, 2019
in
Class 11
by
kratos
cbse
the p block elements
class-11
class-10
icse
chemical reactions and equations
metallurgy
+2
votes
1
answer
Which of the following metallic oxides cannot be reduced by normal reducing agents ?
asked
Mar 28, 2019
in
Class 12
by
kratos
cbse
processes of isolation of elements
class-10
icse
class-12
metallurgy
+1
vote
1
answer
In alumino-thermite process, aluminium is used as : (A) oxidising agent (B) flux (C) reducing agent
asked
Mar 28, 2019
in
Class 12
by
kratos
principles and processes of isolation of elements
class-10
icse
class-12
metallurgy
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