1
IAT (IISER) 2024
MCQ (Single Correct Answer)
+4
-1
Which one of the following statements is correct about $\mathrm{N}_2, \mathrm{CO}$, and $\mathrm{NO}^{+}$?
A
These are isoelectronic and have identical bond order.
B
These are isoelectronic and have different bond orders.
C
These are not isoelectronic but have identical bond order.
D
These are neither isoelectronic nor have identical bond order.
2
IAT (IISER) 2024
MCQ (Single Correct Answer)
+4
-1
Which of the following complexes exhibit(s) magnetic moment close to 2 BM ? $$ \left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]\left(\mathrm{NO}_3\right)_2, \mathrm{~K}_2\left[\mathrm{MnCl}_4\right], \mathrm{K}_4\left[\mathrm{Mn}(\mathrm{CN})_6\right] \text {, and }\left[\mathrm{Ni}(\mathrm{CO})_4\right] $$
A
$\mathrm{K}_4\left[\mathrm{Mn}(\mathrm{CN})_6\right]$ and $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$
B
$K_2\left[\mathrm{MnCl}_4\right]$ and $K_4\left[\mathrm{Mn}(\mathrm{CN})_6\right]$
C
$\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]\left(\mathrm{NO}_3\right)_2$ and $\mathrm{K}_2\left[\mathrm{MnCl}_4\right]$
D
Only $K_4\left[\mathrm{Mn}(\mathrm{CN})_6\right]$
3
IAT (IISER) 2024
MCQ (Single Correct Answer)
+4
-1
According to the VSEPR theory, what are the most stable shapes of $X_4 F_4$ and $\mathrm{SF}_4$, respectively?
A
See-saw and square planar
B
Both see-saw
C
Square planar and see-saw
D
Both square planar
4
IAT (IISER) 2024
MCQ (Single Correct Answer)
+4
-1

The following complex ions absorb in the ultraviolet-visible region of light. Which one of these shows violet colour?

$$ \left[\mathrm{CoCl}\left(\mathrm{NH}_3\right)_5\right]^{2+},\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)\left(\mathrm{NH}_3\right)_5\right]^{3+},\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}, \text { and }\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-} $$

A
$\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)\left(\mathrm{NH}_3\right)_5\right]^{3+}$
B
$\left[\mathrm{CoCl}\left(\mathrm{NH}_3\right)_5\right]^{2+}$
C
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
D
$\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}$
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