Question:

Which one has the highest boiling point?

Updated On: Aug 15, 2022

${{H}_{2}}$
$Xe$
$C{{H}_{4}}$
$He$

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The Correct Option is B

Solution and Explanation

Boiling point

\propto

vander Waals force vander Waals force oc atomic mass (or molecular mass)

\because

Atomic mass of Xe is highest among.

{{\text{H}}_{\text{2}}}\text{,He,}\,\text{C}{{\text{H}}_{\text{4}}}\text{,}\,\text{Xe}

\therefore

Boiling point of Xe is highest.

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Concepts Used:

P-Block Elements

P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.

P block elements consist of:

Group 13 Elements: Boron family
Group 14 Elements: Carbon family
Group 15 Elements: Nitrogen family
Group 16 Elements: Oxygen family
Group 17 Elements: Fluorine family
Group 18 Elements: Neon family