Question:medium

Match List I with List II
List-IList-II
A. Melting point [K]I. Tl > In > Ga > Al > B
B. Ionic Radius [M3/pm]II. B > Tl > Al ≈ Ga ≈ In
C. ΔiH1 [kJ mol-1]III. Tl > In > Al > Ga > B
D. Atomic Radius [pm]IV. B > Al > Tl > In > Ga

Choose the correct answer from the options given below:

Updated On: Apr 1, 2026
  • A-III, B-IV, C-I, D-II
  • A-II, B-III, C-IV, D-I
  • A-IV, B-I, C-II, D-III
  • A-I, B-II, C-III, D-IV
Show Solution

The Correct Option is C

Solution and Explanation

Matching items from List I to List II:
A. Melting point [K]: Trend observed: Tl > In > Ga > Al > B. (Matches I).
B. Ionic Radius [M$^{+3}$/pm]: Boron exhibits the smallest ionic size, followed by Tl > Al $\approx$ Ga > In (Matches II).
C. $\Delta_i H_1$ [kJ mol$^{-1}$]: Ionization enthalpy follows the trend Tl > In > Al > Ga > B.(Matches III).
D. Atomic Radius [pm]: Atomic radius increases in the order B > Al > Tl > In > Ga.(Matches IV).
Correct Answer: (3)

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