JEE Main Chemistry question

The boiling points of the noble gases increase steadily down the group (He to Xe) mainly because of

(A)Increasing strength of London dispersion (induced-dipole) forces with increasing atomic size/polarisabilityCorrect
(B)Increasing ionisation enthalpy down the group
(C)Formation of progressively stronger covalent bonds between atoms
(D)Increasing electron affinity down the group

Answer: (A)

Solution

Noble gas atoms are held together in the liquid/solid only by weak instantaneous-dipole/induced-dipole (London dispersion) forces, since they have no permanent dipole and form no covalent bonds with each other. As atomic size and the number of electrons increase down the group, the

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Question ID VK-146022