|
Name the processes from which chlorine is obtained as a byproduct
|
|
1
|
3564
|
November 2, 2016
|
|
Which of the following metals cannot be extracted by the smelting process: Al, Zn, Fe and Pb. Give reason
|
|
0
|
4259
|
November 2, 2016
|
|
Why is zinc not extracted from zinc oxide through reduction using CO?
|
|
0
|
1387
|
November 2, 2016
|
|
Copper can be extracted by hydrometallurgy but not zinc. Explain
|
|
0
|
935
|
November 2, 2016
|
|
Why copper matte is put in silica lined converter?
|
|
0
|
1608
|
November 2, 2016
|
|
How can you justify this reduction with Ellingham diagram?
|
|
1
|
1162
|
November 2, 2016
|
|
What is coupling of reaction? How is it useful in metallurgy?
|
|
0
|
2688
|
November 2, 2016
|
|
Is it true that under certain conditions
|
|
1
|
727
|
November 2, 2016
|
|
Why does it not take place at room temperature?
|
|
1
|
609
|
November 2, 2016
|
|
Is the reduction of $Cr_{2}O_{3}$ possible with Al?
|
|
1
|
526
|
November 2, 2016
|
|
Why is the reduction of a metal oxide easier
|
|
1
|
2922
|
November 2, 2016
|
|
Write a reaction used for the preparation of wrought iron from cast iron
|
|
1
|
2911
|
November 2, 2016
|
|
Answer the following questions given below
|
|
1
|
625
|
November 2, 2016
|
|
How is mercury extracted from cinnabar?
|
|
0
|
2623
|
November 2, 2016
|
|
What is the role of depressants in froth floatation process?
|
|
1
|
2120
|
November 2, 2016
|
|
Copper and silver lie low in the electrochemical series
|
|
1
|
967
|
November 2, 2016
|
|
Giving examples, differentiate between roasting and calcination
|
|
0
|
2485
|
November 2, 2016
|
|
Why is leaching of gold by metal cyanides carried out in the presence of oxygen?
|
|
1
|
1746
|
November 2, 2016
|
|
How are the following colloids different from each other in respect of their dispersion medium and dispersed phase?
|
|
1
|
4477
|
November 1, 2016
|
|
Explain what is observed,
|
|
1
|
692
|
November 1, 2016
|
|
In reference to Freundlich adsorption isotherm
|
|
1
|
1601
|
November 1, 2016
|
|
Artificial rain is caused by spraying salt over clouds
|
|
0
|
8930
|
November 1, 2016
|
|
Why is it essential to wash the precipitate with water before estimating it quantitatively?
|
|
0
|
1757
|
November 1, 2016
|
|
Give reasons for the following observations:
|
|
1
|
8011
|
November 1, 2016
|
|
Gelatin which is a peptide, is added in ice-creams. What can be its role?
|
|
0
|
3439
|
November 1, 2016
|
|
Give four uses of emulsions
|
|
0
|
1796
|
November 1, 2016
|
|
What are emulsions? What are their different types?
|
|
1
|
932
|
November 1, 2016
|
|
What modification can you suggest in the Hardy-Schulze rule?
|
|
0
|
4355
|
November 1, 2016
|
|
How are the following colloidal solutions prepared?
|
|
1
|
2982
|
November 1, 2016
|
|
Write the dispersed phase and dispersion medium of the following colloidal systems
|
|
1
|
11724
|
November 1, 2016
|