North Maharashtra University 2009 B.Sc Chemistry Noble Gases - Question Paper

S.Y.B.Sc. CH-221( Inorganic Chemistry)

2 MARKS

1. State why the noble gases are placed in VIII group or zero group.
2. Noble gases have no tendency either to loose, gain or share electrons
with atoms of other element why?
3. State where the helium & traces of neon are obtained
4. provide the name ,symbol & outer shell configuration of radioactive inert gas
5. In isolation of inert gas mixture, CO2, water vapour & oxygen are removed
by using which chemicals?
6. Mention 2 uses of neon gas.
7. Name 2 common compound formed by noble gases
8. elaborate clathrates?
9. How XeF2 can be stored for indefinite period
10. Mention 1 fluorinating reaction of XeF2
11. provide 2 properties of XeF4
12. provide chemical reaction to prepare XeF6 by heating mixture of Xenon &
Fluorine

3 MARKS
1. elaborate noble gases? Write their atomic number & electronic
configuration.
2. provide 3 important industrial uses of noble gases.
3. discuss 1 way of isolation of inert gases from atmosphere.
4. How XeF4 is prepared from mixture of Fluorine & Xenon.
5. Comment- Clathrates are normally non-stoichiometric compounds
6. List 4 important uses of Neon.

4 MARKS
1. explain about position of inert gases in periodic table.
2. discuss facts showing that inert gases are monatomic in character.
3. State the uses of Clathrate compounds.
4. Write a note on stability of Clathrate
5. Draw the structures of XeF2 & XeF4. And provide 1 property of every.
6. Mention 4 uses of Krypton.

6 MARKS
1. provide a brief account on occurrence of noble gases.
2. provide a brief account of various methods of isolation of inert gases from
atmosphere.
3. provide 1 method for preparation of XeF6 & write 1 property of it.
4. Write note on compounds of inert gases.

Earning:   Approval pending.