PYQ Vault
EbooksTutor

Trends in atomic radius, ionisation enthalpy and electronegativity in group 13

This type of question, asked 8 times: 29 Jan 2023, 4 Apr 2024, 5 Apr 2024, 9 Apr 2024, 2 Apr 2025, 3 Apr 2025, 4 Apr 2025, 23 Jan 2026 S1. All 9 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    29 Jan 2023

    139
    Given below are two statements: Statement I: The decrease in first ionization enthalpy from BB to AlAl is much larger than that from AlAl to Ga. Statement II: The d orbitals in Ga are completely filled. In the light of the above statements, choose the most appropriate answer from the options given below

    Tap an option to check your answer.

  2. Question 2

    4 Apr 2024

    131
    The correct order of the first ionization enthalpy is

    Tap an option to check your answer.

  3. Question 3

    5 Apr 2024

    139
    The correct statements from the following are: (A) The decreasing order of atomic radii of group 13 elements is Tl>In>Ga>Al>BTl > In > Ga > Al > B. (B) Down the group 13 electronegativity decreases from top to bottom. (C) AlAl dissolves in dil. HClHCl and liberate H2H_{2} but conc. HNO3HNO_{3} renders AlAl passive by forming a protective oxide layer on the surface. (D) All elements of group 13 exhibits highly stable +1 oxidation state. (E) Hybridization of AlAl in [Al(H2O)6]3+\left\lbrack Al\left( H_{2}O \right)_{6} \right\rbrack^{3 +} ion is sp3 d2sp^{3}{\text{ }d}^{2}. Choose the correct answer from the options given below:

    Tap an option to check your answer.

  4. Question 4

    9 Apr 2024

    137
    Match List I with List II
    List-IList-II
    A.Melting point [K]\lbrack K\rbrackII.
    Tl>In>Ga>Al>BTl > In > Ga > Al > B
    B.Ionic Radius
    [M+3/pm]\left\lbrack M^{+ 3}/pm \right\rbrack
    		II.
    B>Tl>Al≈Ga>InB > Tl > Al \approx Ga > In
    C.
    ΔiH1\Delta_{i}H_{1}
    [ kJ mol−1]\left\lbrack \text{ }kJ{\text{ }mol}^{- 1} \right\rbrack
    		IIIIII.
    Tl>In>Al>Ga>BTl > In > Al > Ga > B
    D.Atomic Radius
    [pm]\lbrack pm\rbrack
    		IVIV.
    B>Al>Tl>In>GaB > Al > Tl > In > Ga
    Choose the correct answer from the options given below:

    Tap an option to check your answer.

  5. Question 5

    2 Apr 2025

    39
    Given below are two statements : Statement (I) : The metallic radius of Al is less than that of Ga . Statement (II) : The ionic radius of Al3+{Al}^{3 +} is less than that of Ga3+{Ga}^{3 +}. In the light of the above statements, choose the most appropriate answer from the options given below :

    Tap an option to check your answer.

  6. Question 6

    3 Apr 2025

    118
    The correct orders among the following are Atomic radius : B<Al<Ga<In<TlB < Al < Ga < In < Tl Electronegativity: Al<Ga<In<Tl<BAl < Ga < In < Tl < B Density : Tl<In<Ga<Al<BTl < In < Ga < Al < B 1st Ionisation Energy: In<Al<Ga<Tl<BIn < Al < Ga < Tl < B Choose the correct answer from the options given below :

    Tap an option to check your answer.

  7. Question 7

    4 Apr 2025

    40
    Given below are the pairs of group 13 elements showing their relation in terms of atomic radius.(B<Al),(Al<Ga),(Ga<In) and (In<Tl)(B < Al),(Al < Ga),(Ga < In)\text{~and~}(In < Tl) Identify the elements present in the incorrect pair and in that pair find out the element (X) that has higher ionic radius (M3+)\left( M^{3 +} \right) that the other one. The atomic number of the element (X)(X) is

    Tap an option to check your answer.

  8. Question 8

    4 Apr 2025

    117
    The elements of Group 13 with highest and lowest first ionisation enthalpies are respectively:

    Tap an option to check your answer.

  9. Question 9

    23 Jan 2026 S1

    44
    The correct statements from the following are : (A) Ionic radii of trivalent cations of group 13 elements decreases down the group. (B) Electronegativity of group 13 elements decreases down the group. (C) Among the group 13 elements, Boron has highest first ionisation enthalpy. (D) The trichloride and triiodide of group 13 elements are covalent in nature. Choose the correct answer from the options given below :

    Tap an option to check your answer.