The correct orders among the following are Atomic radius : $\mathrm{B} \lt \mathrm{Al} \lt \mathrm{Ga} \lt…

The correct orders among the following are
Atomic radius : $\mathrm{B} \lt \mathrm{Al} \lt \mathrm{Ga} \lt \mathrm{In} \lt \mathrm{Tl}$
Electronegativity : $\mathrm{Al} \lt \mathrm{Ga} \lt \mathrm{In} \lt \mathrm{Tl} \lt \mathrm{B}$
Density : $\mathrm{Tl} \lt \mathrm{In} \lt \mathrm{Ga} \lt \mathrm{Al} \lt \mathrm{B}$
1st Ionisation Energy : In $ \lt \mathrm{Al} \lt \mathrm{Ga} \lt \mathrm{Tl} \lt \mathrm{B}$
Choose the correct answer from the options given below :
  1. B and D Only
  2. A and C Only
  3. C and D Only
  4. A and B Only

Solution

$\begin{array}{|l|l|l|l|l|l|} \hline & \text{B} & \text{Al} & \text{Ga} & \text{In} & \text{Tl} \\ \hline \begin{array}{l} \text{Atomic radius } \mathrm{pm} \end{array} & 88 & 143 & 135 & 167 & 170 \\ \hline \text{Electronegativity} & 2 & 1.5 & 1.6 & 1.7 & 1.8 \\ \hline \begin{array}{l} \text{Density} \\ \left(\mathrm{g} / \mathrm{cm}^3\right)\end{array} & 2.35 & 2.7 & 5.9 & 7.31 & 11.85 \\ \hline \begin{array}{l} \text{Ionisation} \\ \text{Energy} \text{ (kJ/mol)} \end{array} & 801 & 577 & 579 & 558 & 589 \\\hline\end{array}$
Radius Order $\quad \mathrm{T} \ell \gt \mathrm{In} \gt \mathrm{A} \ell \gt \mathrm{Ga} \gt \mathrm{B}$
EN Order $\mathrm{B} \gt \mathrm{T} \ell \gt \mathrm{In} \gt \mathrm{Ga} \gt \mathrm{Al}$
Density Order $\mathrm{T} \ell \gt \mathrm{In} \gt \mathrm{Ga} \gt \mathrm{A} \ell \gt \mathrm{B}$
$\mathrm{IE}_1$ Order $\mathrm{B} \gt \mathrm{T} \ell \gt \mathrm{Ga} \gt \mathrm{A} \ell \gt \mathrm{In}$

Asked in: JEE Main 2025 (03 Apr Shift 2)

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