|
Statues coated with white lead on long exposure to atmosphere turn black and the original colour can be restored on treatment with ${{H}_{2}}$${{O}_{2}}$. Explain
|
|
0
|
1797
|
August 13, 2016
|
|
What is the significance of ${{H}_{2}}$${{O}_{2}}$ labelled as '30 volumes'
|
|
0
|
523
|
August 13, 2016
|
|
What is the trade name of hydrogen peroxide used as an antispetic?
|
|
0
|
1001
|
August 13, 2016
|
|
Discuss the principle and method of softening of hard water by synthetic Ion-exchange Resins
|
|
1
|
5797
|
August 13, 2016
|
|
What properties of Water make it useful as a solvent?
|
|
1
|
1382
|
August 13, 2016
|
|
What characteristics do you expect from an electron with respect to its structure and chemical reactions?
|
|
0
|
696
|
August 13, 2016
|
|
What do you understand by
|
|
1
|
1825
|
August 13, 2016
|
|
A) What causes the permanent hardness of water? Mention one method to remove permanent hardness
|
|
1
|
1413
|
August 13, 2016
|
|
What is the difference between hydrolysis and hydration?
|
|
0
|
9044
|
August 13, 2016
|
|
Describe the usefulness of water in Biosphere and Biological systems?
|
|
0
|
829
|
August 13, 2016
|
|
What is meant by 'demineralised' water and how can it be obtained?
|
|
0
|
3448
|
August 13, 2016
|
|
Write chemical reactions to show amphoteric nature in water
|
|
0
|
9777
|
August 13, 2016
|
|
Describe the structure of common form of ice?
|
|
0
|
9618
|
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
|
423
|
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
|
1792
|
August 13, 2016
|
|
What do you understand by the term autoprotolysis of water ? What is its significance?
|
|
0
|
9436
|
August 13, 2016
|
|
How do you expect the metallic hydrides to be useful for hydrogen storage ? Explain
|
|
0
|
4021
|
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
|
3535
|
August 13, 2016
|
|
Do you except the carbon hydrides of the type to act as Lewis acid or base?
|
|
1
|
1635
|
August 13, 2016
|
|
What is meant by auto-protolysis of water?
|
|
0
|
3284
|
August 13, 2016
|
|
The boiling point of ${{H}_{2}}$O is higher than that of ${{H}_{2}}$S. Explain
|
|
0
|
417
|
August 13, 2016
|
|
A sample of hard water is allowed to pass through an anion exchanger. Will it produce lather with soap easily?
|
|
0
|
1300
|
August 13, 2016
|
|
Complete the reaction:
|
|
1
|
589
|
August 13, 2016
|
|
Name a process which can remove both temporary and permanent hardness of water
|
|
0
|
622
|
August 13, 2016
|
|
Which salts piesent in water make it permament hard?
|
|
0
|
450
|
August 13, 2016
|
|
Can distilled water be called as deionised water
|
|
0
|
736
|
August 13, 2016
|
|
Can marine species live in distilled water?
|
|
0
|
1392
|
August 13, 2016
|
|
Explain why electrolysis of ordinary water occurs faster than heavy water
|
|
0
|
1174
|
August 13, 2016
|
|
Write two uses of interstitial hydrides
|
|
0
|
909
|
August 13, 2016
|
|
Explain why beryllium forms a covalent hydride while calcium forms an ionic hydride?
|
|
0
|
1939
|
August 13, 2016
|