|
Statues coated with white lead on long exposure to atmosphere turn black and the original colour can be restored on treatment with ${{H}_{2}}$${{O}_{2}}$. Explain
|
|
0
|
1765
|
August 13, 2016
|
|
What is the significance of ${{H}_{2}}$${{O}_{2}}$ labelled as '30 volumes'
|
|
0
|
484
|
August 13, 2016
|
|
What is the trade name of hydrogen peroxide used as an antispetic?
|
|
0
|
964
|
August 13, 2016
|
|
Discuss the principle and method of softening of hard water by synthetic Ion-exchange Resins
|
|
1
|
5639
|
August 13, 2016
|
|
What properties of Water make it useful as a solvent?
|
|
1
|
1359
|
August 13, 2016
|
|
What characteristics do you expect from an electron with respect to its structure and chemical reactions?
|
|
0
|
638
|
August 13, 2016
|
|
What do you understand by
|
|
1
|
1774
|
August 13, 2016
|
|
A) What causes the permanent hardness of water? Mention one method to remove permanent hardness
|
|
1
|
1367
|
August 13, 2016
|
|
What is the difference between hydrolysis and hydration?
|
|
0
|
8959
|
August 13, 2016
|
|
Describe the usefulness of water in Biosphere and Biological systems?
|
|
0
|
802
|
August 13, 2016
|
|
What is meant by 'demineralised' water and how can it be obtained?
|
|
0
|
3408
|
August 13, 2016
|
|
Write chemical reactions to show amphoteric nature in water
|
|
0
|
9707
|
August 13, 2016
|
|
Describe the structure of common form of ice?
|
|
0
|
9446
|
August 13, 2016
|
|
Consider the reaction of water with ${{F}_{2}}$ and suggest in terms of oxidation and reduction which spedes are oxidised/reduced?
|
|
0
|
380
|
August 13, 2016
|
|
Saline hydrides are known to react with water violently producting fire. Can C${{O}_{2}}$ a well known fire extinguishes be used in this case ? Explain
|
|
0
|
1733
|
August 13, 2016
|
|
What do you understand by the term autoprotolysis of water ? What is its significance?
|
|
0
|
9370
|
August 13, 2016
|
|
How do you expect the metallic hydrides to be useful for hydrogen storage ? Explain
|
|
0
|
3993
|
August 13, 2016
|
|
What do you understand by the term "non-stoichiometric hydrides" ? Do you expect this type of the hydrides to be formed by alkali metals ? Justify your answer
|
|
0
|
3494
|
August 13, 2016
|
|
Do you except the carbon hydrides of the type to act as Lewis acid or base?
|
|
1
|
1568
|
August 13, 2016
|
|
What is meant by auto-protolysis of water?
|
|
0
|
3241
|
August 13, 2016
|
|
The boiling point of ${{H}_{2}}$O is higher than that of ${{H}_{2}}$S. Explain
|
|
0
|
389
|
August 13, 2016
|
|
A sample of hard water is allowed to pass through an anion exchanger. Will it produce lather with soap easily?
|
|
0
|
1256
|
August 13, 2016
|
|
Complete the reaction:
|
|
1
|
555
|
August 13, 2016
|
|
Name a process which can remove both temporary and permanent hardness of water
|
|
0
|
592
|
August 13, 2016
|
|
Which salts piesent in water make it permament hard?
|
|
0
|
411
|
August 13, 2016
|
|
Can distilled water be called as deionised water
|
|
0
|
705
|
August 13, 2016
|
|
Can marine species live in distilled water?
|
|
0
|
1351
|
August 13, 2016
|
|
Explain why electrolysis of ordinary water occurs faster than heavy water
|
|
0
|
1135
|
August 13, 2016
|
|
Write two uses of interstitial hydrides
|
|
0
|
880
|
August 13, 2016
|
|
Explain why beryllium forms a covalent hydride while calcium forms an ionic hydride?
|
|
0
|
1893
|
August 13, 2016
|