Statues coated with white lead on long exposure to atmosphere turn black and the original colour can be restored on treatment with ${{H}_{2}}$${{O}_{2}}$. Explain
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0
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1751
|
August 13, 2016
|
What is the significance of ${{H}_{2}}$${{O}_{2}}$ labelled as '30 volumes'
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0
|
466
|
August 13, 2016
|
What is the trade name of hydrogen peroxide used as an antispetic?
|
|
0
|
955
|
August 13, 2016
|
Discuss the principle and method of softening of hard water by synthetic Ion-exchange Resins
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1
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5575
|
August 13, 2016
|
What properties of Water make it useful as a solvent?
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1
|
1337
|
August 13, 2016
|
What characteristics do you expect from an electron with respect to its structure and chemical reactions?
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0
|
614
|
August 13, 2016
|
What do you understand by
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1
|
1759
|
August 13, 2016
|
A) What causes the permanent hardness of water? Mention one method to remove permanent hardness
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1
|
1346
|
August 13, 2016
|
What is the difference between hydrolysis and hydration?
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0
|
8929
|
August 13, 2016
|
Describe the usefulness of water in Biosphere and Biological systems?
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0
|
787
|
August 13, 2016
|
What is meant by 'demineralised' water and how can it be obtained?
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0
|
3395
|
August 13, 2016
|
Write chemical reactions to show amphoteric nature in water
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0
|
9685
|
August 13, 2016
|
Describe the structure of common form of ice?
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|
0
|
9388
|
August 13, 2016
|
Consider the reaction of water with ${{F}_{2}}$ and suggest in terms of oxidation and reduction which spedes are oxidised/reduced?
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0
|
362
|
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
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|
0
|
1702
|
August 13, 2016
|
What do you understand by the term autoprotolysis of water ? What is its significance?
|
|
0
|
9350
|
August 13, 2016
|
How do you expect the metallic hydrides to be useful for hydrogen storage ? Explain
|
|
0
|
3980
|
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
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|
0
|
3478
|
August 13, 2016
|
Do you except the carbon hydrides of the type to act as Lewis acid or base?
|
|
1
|
1545
|
August 13, 2016
|
What is meant by auto-protolysis of water?
|
|
0
|
3211
|
August 13, 2016
|
The boiling point of ${{H}_{2}}$O is higher than that of ${{H}_{2}}$S. Explain
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|
0
|
377
|
August 13, 2016
|
A sample of hard water is allowed to pass through an anion exchanger. Will it produce lather with soap easily?
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|
0
|
1237
|
August 13, 2016
|
Complete the reaction:
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|
1
|
543
|
August 13, 2016
|
Name a process which can remove both temporary and permanent hardness of water
|
|
0
|
579
|
August 13, 2016
|
Which salts piesent in water make it permament hard?
|
|
0
|
401
|
August 13, 2016
|
Can distilled water be called as deionised water
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|
0
|
695
|
August 13, 2016
|
Can marine species live in distilled water?
|
|
0
|
1324
|
August 13, 2016
|
Explain why electrolysis of ordinary water occurs faster than heavy water
|
|
0
|
1119
|
August 13, 2016
|
Write two uses of interstitial hydrides
|
|
0
|
868
|
August 13, 2016
|
Explain why beryllium forms a covalent hydride while calcium forms an ionic hydride?
|
|
0
|
1862
|
August 13, 2016
|