Chemical Properties of Noble Gases

Q. The diverse chemistry of Xenon happens largely only with highly electronegative elements like Fluorine and Oxygen – True or False?

1. True
2. False

Q. Select the correct statement among the following:

1. Helium has the lowest melting point and boiling point.
2. Neon, argon, krypton and xenon form clathrates.
3. Helium can diffuse through rubber, PVC and even glass.
4. All the noble gases are monoatomic.
5. All the noble gases have negative electron gain enthalpy.

Q. In the clathrates of xenon with water, the nature of bonding between xenon and water molecule is:

1. Covalent
2. Co-ordinate
3. Hydrogen bonding
4. Dipole-induced dipole interactions

Q. Consider the following properties of the noble gases :
$I$ : They readily form compounds which are colourless
$II$ : They generally do not form ionic compounds
$III$ : Xenon has variable oxidation states in its compounds
$IV$ : The smaller $He$ and $Ne$ do not form clathrate compounds.
Select correct properties.

1. $I,II,III$
2. $II,III,IV$
3. $I,III,IV$
4. All

Q. Draw the structures of the following molecules :
(i) $N_2{O}_5$
(ii) $Xe{F}_2$

Q.

Which one of the following does not exist?

(i) $XeO{F}_4$

(ii) $Ne{F}_2$

(iii) $Xe{F}_2$

(iv) $Xe{F}_6$

Q. Which statement about noble gases is not correct :

1. Xe forms$Xe{F}_6$
2. Ar is used in electric bulbs
3. Kr is obtained during radioactive disintegration.
4. He has the lowest b.pt among all the noble
   gases

Q. In modern diving apparatus, a mixture of $He$ and $O_2$ is used. Why ?

Q. Which of the following is not known?

1. $Xe{F}_4$
2. $Kr{F}_6$
3. $C{s}_{2}Xe{F}_6$
4. $Xe{F}_6$

Q. The equilibrium $PC{l}_5\left(g\right)\rightleftharpoons PC{l}_3\left(g\right)+C{l}_2\left(g\right)$, may be shifted to the right if:

1. an inert gas is added at constant pressure
2. an inert gas is added at constant volume
3. pressure is increased
4. $PC{l}_3$ and $C{l}_2$ are added