1
JEE Main 2024 (Online) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following complex is homoleptic?
A
$\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$
B
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$
C
$\left[\mathrm{Fe}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$
D
$\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$
2
JEE Main 2024 (Online) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Given below are two statements :

Statement (I) : A solution of $\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ is green in colour.

Statement (II) : A solution of $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ is colourless.

In the light of the above statements, choose the most appropriate answer from the options given below :
A
Statement I is incorrect but Statement II is correct
B
Both Statement I and Statement II are correct
C
Both Statement I and Statement II are incorrect
D
Statement I is correct but Statement II is incorrect
3
JEE Main 2024 (Online) 31st January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Select the option with correct property -

A
$$\left[\mathrm{Ni}(\mathrm{CO})_4\right]$$ and $$\left[\mathrm{NiCl}_4\right]^{2-}$$ both Paramagnetic
B
$$\left[\mathrm{Ni}(\mathrm{CO})_4\right]$$ and $$\left[\mathrm{NiCl}_4\right]^{2-}$$ both Diamagnetic
C
$$\left[\mathrm{NiCl}_4\right]^{2-}$$ Diamagnetic, $$\left[\mathrm{Ni}(\mathrm{CO})_4\right]$$ Paramagnetic
D
$$\left[\mathrm{Ni}(\mathrm{CO})_4\right]$$ Diamagnetic, $$\left[\mathrm{NiCl}_4\right]^{2-}$$ Paramagnetic
4
JEE Main 2024 (Online) 31st January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List I with List II

List - I
(Complex ion)
List - II
(Electronic Configuration)
(A) $$\mathrm{[Cr(H_2O)_6]^{3+}}$$ (I) $$t_{2 g}{ }^2 e_g^0$$
(B) $$\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$$ (II) $$t_{2 g}{ }^3 e_g{ }^0$$
(C) $$\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$$ (III) $$t_{2 g}{ }^3 e_g{ }^2$$
(D) $$\left[\mathrm{V}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$$ (IV) $$t_{2 g}{ }^6 e_g^2$$

Choose the correct answer from the options given below:

A
A-IV, B-I, C-II, D-III
B
A-III, B-II, C-IV, D-I
C
A-II, B-III, C-IV, D-I
D
A-IV, B-III, C-I, D-II
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