General Introduction of Group 18 Elements

Arrange the following gases in increasing order of van der Waals constant $\text{'}\mathrm{a}\text{'}$
(A) $\mathrm{Ar}$
(B) ${\mathrm{CH}}_4$
(C) ${\mathrm{H}}_2\mathrm{O}$
(D) ${\mathrm{C}}_6{\mathrm{H}}_6$
Choose the correct option from the following.

Which of the following has the largest atomic radii?

Which of the following is correct about compound $\mathrm{X}$ (Atomic number $=18$)?

Assertion: The majority of noble gas compounds are those of xenon $\left(\mathrm{Xe}\right)$.

Reason: Xenon has the lowest ionization enthalpy and can be easily oxidized by oxidizing agents like oxygen and fluorine

Which is the most abundant noble gas?

Which noble gas is most abundant in the atmospheric dry air? 

The mineral used in the isolation of radium is

_____ is not an inert gas.

Name the elements of group $18.$
 

Arrange the following atoms based on their liquefaction factor in decreasing order. $\mathrm{He}, \mathrm{Ne}, \mathrm{Xe}, \mathrm{Ar} \mathrm{and} \mathrm{Kr}.$

How many of the given gases below have a noble gas configuration?

1. ${\mathrm{Fe}}^{2+}$

2. ${\mathrm{Cs}}^{+}$

3. ${\mathrm{Sr}}^{2+}$

4. ${\mathrm{Pb}}^{2+}$

Which one of the following noble gas is obtained by radioactive disintegration?

Which noble gas is most abundant in atmosphere?

The first compound of noble gas prepared by Bartlett was

The inert gas which is most abundant in the atmosphere is:

The most abundant noble gas in the atmosphere is

Choose the incorrect statement about noble gas?

Which one of the following is used for the separation of noble gas mixture from air?

Which of the following ions is not having the configuration of neon

Assertion $\left(\mathrm{A}\right)$ : Noble gases have very low boiling points.

Reason $\left(\mathrm{R}\right)$ : All noble gases have general electronic configuration of $n{s}^2 n{p}^6$ (except He)