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Question: Match list I with list II and select the CORRECT answer: List–I (Process) List–II (Operating intera...

Match list I with list II and select the CORRECT answer:

List–I (Process) List–II (Operating interaction involved)

(P) Clathrate compound of Xe in ice (1) Ion - Dipole

(Q) Liquation of Xe gas (2) Dipole - Dipole

(R) Liquation of HCl gas (3) Dipole - Induced dipole

(S) Hydration of Na+

A

1 3 4 2

B

3 4 1 2

C

3 4 2 1

D

1 3 2 4

Answer

P-3, Q-4, R-2, S-1

Explanation

Solution

The question asks us to match processes in List-I with the dominant intermolecular interactions involved in List-II.

Let's analyze each process:

(P) Clathrate compound of Xe in ice:

  • Xenon (Xe) is a noble gas, which is nonpolar.
  • Ice (H₂O) is water in solid form, and water is a polar molecule with a permanent dipole moment.
  • When a nonpolar molecule (Xe) interacts with a polar molecule (H₂O), the permanent dipole of water induces a temporary dipole in the nonpolar Xe atom. This interaction is called a Dipole - Induced dipole interaction.
  • Therefore, (P) matches with (3).

(Q) Liquation of Xe gas:

  • Liquation (or liquefaction) is the process of converting a gas into a liquid. This requires the gas molecules to come close enough to experience intermolecular forces.
  • Xenon (Xe) is a nonpolar atom. The only intermolecular forces present between nonpolar atoms or molecules are London Dispersion Forces (also known as instantaneous dipole - induced dipole forces or van der Waals forces). These forces arise from temporary, fluctuating dipoles.
  • Therefore, (Q) matches with (4).

(R) Liquation of HCl gas:

  • Hydrogen chloride (HCl) is a polar molecule because of the significant electronegativity difference between hydrogen and chlorine, resulting in a permanent dipole moment.
  • When HCl gas liquefies, HCl molecules interact with other HCl molecules. The primary intermolecular force between polar molecules is the Dipole - Dipole interaction.
  • Therefore, (R) matches with (2).

(S) Hydration of Na+^+:

  • Hydration refers to the process where water molecules surround and interact with an ion or molecule.
  • Na+^+ is a positive ion.
  • Water (H₂O) is a polar molecule with a negative end (oxygen) and positive ends (hydrogens).
  • The interaction between an ion (Na+^+) and a polar molecule (H₂O) is an Ion - Dipole interaction. The positive Na+^+ ion is attracted to the negative (oxygen) end of the water dipole.
  • Therefore, (S) matches with (1).

Combining the matches:

  • (P) - (3)
  • (Q) - (4)
  • (R) - (2)
  • (S) - (1)

Option (C) correctly matches our derived relationships.