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Which leader sought revenge, reconciliation and isolation after world war 1 and why?
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|
0
|
388
|
March 20, 2018
|
|
Name the common elements present as anode
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|
1
|
783
|
November 2, 2016
|
|
Write the chemical equations for the involved reactions
|
|
1
|
1444
|
November 2, 2016
|
|
Write chemical reactions taking place in the extraction of zinc from zinc blende
|
|
0
|
1381
|
November 2, 2016
|
|
Write down the reactions taking place in different zones in the blast furnace during the extraction of iron
|
|
0
|
2416
|
November 2, 2016
|
|
What is the role of graphite rods in the electrometallurgy of aluminium?
|
|
0
|
1749
|
November 2, 2016
|
|
What should be the considerations during the extraction of metals by electrochemical method?
|
|
0
|
1900
|
November 2, 2016
|
|
Name the processes from which chlorine is obtained as a byproduct
|
|
1
|
3451
|
November 2, 2016
|
|
Which of the following metals cannot be extracted by the smelting process: Al, Zn, Fe and Pb. Give reason
|
|
0
|
4200
|
November 2, 2016
|
|
Why is zinc not extracted from zinc oxide through reduction using CO?
|
|
0
|
1326
|
November 2, 2016
|
|
Copper can be extracted by hydrometallurgy but not zinc. Explain
|
|
0
|
889
|
November 2, 2016
|
|
Why copper matte is put in silica lined converter?
|
|
0
|
1561
|
November 2, 2016
|
|
How can you justify this reduction with Ellingham diagram?
|
|
1
|
1112
|
November 2, 2016
|
|
What is coupling of reaction? How is it useful in metallurgy?
|
|
0
|
2655
|
November 2, 2016
|
|
Is it true that under certain conditions
|
|
1
|
688
|
November 2, 2016
|
|
Why does it not take place at room temperature?
|
|
1
|
576
|
November 2, 2016
|
|
Is the reduction of $Cr_{2}O_{3}$ possible with Al?
|
|
1
|
485
|
November 2, 2016
|
|
Why is the reduction of a metal oxide easier
|
|
1
|
2891
|
November 2, 2016
|
|
Write a reaction used for the preparation of wrought iron from cast iron
|
|
1
|
2857
|
November 2, 2016
|
|
Answer the following questions given below
|
|
1
|
588
|
November 2, 2016
|
|
How is mercury extracted from cinnabar?
|
|
0
|
2450
|
November 2, 2016
|
|
What is the role of depressants in froth floatation process?
|
|
1
|
2063
|
November 2, 2016
|
|
Copper and silver lie low in the electrochemical series
|
|
1
|
931
|
November 2, 2016
|
|
Giving examples, differentiate between roasting and calcination
|
|
0
|
2435
|
November 2, 2016
|
|
Why is leaching of gold by metal cyanides carried out in the presence of oxygen?
|
|
1
|
1700
|
November 2, 2016
|