|
Is demineralised or distilled water useful for drinking purposes ? If not how can it be made useful?
|
|
0
|
3274
|
August 13, 2016
|
|
Arrange the following:
|
|
1
|
428
|
August 13, 2016
|
|
Among N${{H}_{3}}$,${{H}_{2}}$O and HF, which would you expect to have highest magnitude of hydrogen bonding and why?
|
|
0
|
470
|
August 13, 2016
|
|
What do you understand by the term:
|
|
1
|
4148
|
August 12, 2016
|
|
Write down two forms of hydrogen which are used as a energy donor
|
|
0
|
555
|
August 12, 2016
|
|
What are typical properties of hydrogen?
|
|
0
|
492
|
August 12, 2016
|
|
Complete the following?
|
|
1
|
456
|
August 12, 2016
|
|
Which isotope of Hydrogen
|
|
1
|
508
|
August 12, 2016
|
|
Describe relative stability of different isotopes of Hydrogen. What percentage of each is present in Hydrogen gas?
|
|
0
|
557
|
August 12, 2016
|
|
Discuss the consequences of high enthalpy of H—H bond in terms of chemical reactivity of dihydrogen?
|
|
0
|
2097
|
August 12, 2016
|
|
Write the names of isotopes of Hydrogen. What is the mass ratio of these isotopes?
|
|
0
|
4590
|
August 12, 2016
|
|
Justify the position of hydrogen in the periodic table on the basis of its electronic configuration?
|
|
0
|
4160
|
August 12, 2016
|
|
Describe the bulk preparation of dihydrogen by electrolytic method. What is the role of an electrolyte in this process
|
|
0
|
2487
|
August 12, 2016
|
|
How can the production of dihydrogen, obtained from 'coal gasification' be increased?
|
|
0
|
3954
|
August 12, 2016
|
|
Give two advantages of using hydrogen as a fuel over gasoline
|
|
0
|
951
|
August 12, 2016
|
|
Does hydrogen support combustion?
|
|
0
|
602
|
August 12, 2016
|
|
Name the element which when reacted with dil. ${{H}_{2}}S{{O}_{4}}$ gives pure hydrogen
|
|
0
|
501
|
August 12, 2016
|
|
Concentrated ${{H}_{2}}S{{O}_{4}}$ cannot be used to dry moist ${{H}_{2}}$ gas. Why?
|
|
0
|
362
|
August 12, 2016
|
|
Name one example of a reaction in which hydrogen acts as an oxidizing agent
|
|
0
|
2225
|
August 12, 2016
|
|
How will you show that hydrogen is an electropositive element?
|
|
0
|
679
|
August 12, 2016
|
|
Which isotope of hydrogen contains equal number of proton and neutron?
|
|
0
|
959
|
August 12, 2016
|
|
Why hydrogen behaves both as a halogen and as an alkali metal?
|
|
0
|
521
|
August 12, 2016
|
|
Out of the following metals which can be used to liberate ${{H}_{2}}$ gas on reaction with dil. hydrochloric acid?
|
|
1
|
375
|
August 12, 2016
|
|
Which gaseous compound on treatment with dihydrogen produces methanol?
|
|
0
|
1340
|
August 12, 2016
|
|
What are the constituents of water gas?
|
|
0
|
1720
|
August 12, 2016
|
|
Why is dihydrogen gas not preferred in baloons?
|
|
0
|
497
|
August 12, 2016
|
|
How does the atomic hydrogen or oxy-hydrogen torch function for cutting and welding purposes?Explain
|
|
0
|
2920
|
August 12, 2016
|
|
Complete the following reactions :
|
|
1
|
2866
|
August 12, 2016
|
|
Why does hydrogen occur in diatomic form rather than in a monoatomic form under normal conditions?
|
|
0
|
5979
|
August 12, 2016
|
|
Write the skeleton equations for the following chemical reactions and balance them by oxidation number method
|
|
1
|
4104
|
August 12, 2016
|