1
IAT (IISER) 2022
MCQ (Single Correct Answer)
+4
-1
For the colourless complex $\left[M\left(H_2 O\right)_6\right]^{n+}$, where $M$ is a $3 d$ transition metal, the CORRECT ground state $d$-electron configuration of $M$ is
A
$\left(t_{2 g}\right)^3\left(e_g\right)^0$
B
$\left(t_{2 g}\right)^6\left(e_g\right)^4$
C
$\left(t_{2 g}\right)^6\left(e_g\right)^2$
D
$\left(t_{2 g}\right)^4\left(e_g\right)^2$
2
IAT (IISER) 2022
MCQ (Single Correct Answer)
+4
-1

Choose the correct statement about the structure of $\mathrm{C}_{60}$ fullerene

A
6-membered rings are fused with 5-membered rings ONLY.
B
6-membered rings are fused with 6-membered rings ONLY.
C
5-membered rings are fused with 6-membered rings ONLY.
D
5-membered rings are fused with both 5-membered and 6-membered rings.
3
IAT (IISER) 2022
MCQ (Single Correct Answer)
+4
-1

$$ \text { The first to fifth ionization energies (IE) of two p-block elements } X \text { and } Y \text { are given below. } $$

$$ \begin{array}{|c|c|c|c|c|c|} \hline & \mathrm{IE}_1(\mathrm{eV}) & \mathrm{IE}_2(\mathrm{eV}) & \mathrm{IE}_3(\mathrm{eV}) & \mathrm{IE}_4(\mathrm{eV}) & \mathrm{IE}_5(\mathrm{eV}) \\ \hline \mathbf{X} & 6.0 & 18.8 & 28.4 & 120.0 & 153.7 \\ \hline \mathbf{Y} & 8.2 & 16.3 & 33.5 & 45.1 & 166.7 \\ \hline \end{array} $$

$$ \text { The number of valence electrons in } X \text { and } Y \text { respectively are } $$

A
1,4
B
3,4
C
3,5
D
4,5
4
IAT (IISER) 2022
MCQ (Single Correct Answer)
+4
-1

Which of the following expressions represents the hydrogen atom wave function $\psi(r)$ shown in the figure below? ( $r$ is the distance of the electron from the nucleus and $a_0$ is a constant)

IAT (IISER) 2022 Chemistry - Atomic Structure Question 1 English
A
$\cdot \frac{1}{\sqrt{\pi}}\left(\frac{1}{a_0}\right)^{3 / 2} e^{-r / 2 a_0}$
B
$\frac{1}{\sqrt{6 \pi}}\left(\frac{1}{a_0}\right)^{3 / 2}\left(\frac{r}{a_0}\right) e^{-r / 2 a_0}$
C
$\frac{1}{4 \sqrt{2 \pi}}\left(\frac{1}{a_0}\right)^{3 / 2}\left(2-\frac{r}{a_0}\right) e^{-r / 2 a_0}$
D
$\frac{1}{\sqrt{3 \pi}}\left(\frac{1}{a_0}\right)^{3 / 2}\left(3-\frac{2 r}{a_0}+\frac{2 r^2}{9 a_0^2}\right) e^{-r / 3 a_0}$
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