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Match List I with List II List-I A. Melting point [K] B. Ionic Radius [M^3+/pm] C. Δ_iH_1 [kJ mol^-1] D. Atomic Radius [pm] List-II I. Tl > In > Ga > Al > B II. B > Tl > Al ≈ Ga > In III. Tl > In > Al > Ga > B IV. B > Al > Tl > In > Ga Choose the correct answer from the options given below:

1. A-III, B-IV, C-I, D-II
2. A-II, B-III, C-IV, D-I
3. A-IV, B-I, C-II, D-III
4. A-I, B-II, C-III, D-IV

Correct answer: A-IV, B-I, C-II, D-III

Solution

The correct matches reflect the trends in melting points, ionic radii, ionization enthalpy, and atomic radii based on periodic properties and group trends. For instance, the melting point increases with atomic size and bonding characteristics, while ionic radius decreases across a period, and ionization enthalpy generally increases due to greater nuclear charge.

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