The correct orders among the following are Atomic radius: B < Al < Ga < In < Tl Electronegativity : Al < Ga < In < Tl < B Density : Tl < In < Ga < Al < B 1 st Ionisation energy : In < Al < Ga < Tl < B Choose the correct answer from the options given below :

Chemistry · p-Block Elements (Group 15-18)

JEE Main 2025 — 3 April, Evening Shift — Question 11

The correct orders among the following are

Atomic radius: $\mathrm{B}<\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}$

Electronegativity : $\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}<\mathrm{B}$

Density : $\mathrm{Tl}<\mathrm{In}<\mathrm{Ga}<\mathrm{Al}<\mathrm{B}$

$1^{\text {st }}$ Ionisation energy : $\mathrm{In}<\mathrm{Al}<\mathrm{Ga}<\mathrm{Tl}<\mathrm{B}$

Choose the correct answer from the options given below :

$\mathrm{EN}: \mathrm{B}>\mathrm{Tl}>\mathrm{In}>\mathrm{Ga}>\mathrm{Al}$

(2.0) (1.8) (1.7) (1.6) (1.5)

$\mathrm{IE}_{1}: \mathrm{B}>\mathrm{Tl}>\mathrm{Ga}>\mathrm{Al}>\mathrm{In}$

(801) (589) (579) (577) (558) (in kJ/mol) Density:

$\mathrm{Tl}>\mathrm{In}>\mathrm{Ga}>\mathrm{Al}>\mathrm{B}$

(11.85) (7.31) (5.9) (2.7) (2.35) (in g/ml)

Atomic radius: $\mathrm{B}<\mathrm{Ga}<\mathrm{Al}<\mathrm{In}<\mathrm{Tl}$

(85) (135) (143) (167) (170) (in pm

Answer key and solution verified before publishing.

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