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1
JEE Main 2022 (Online) 27th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Low oxidation state of metals in their complexes are common when ligands :

A
have good $$\pi$$-accepting character
B
have good $$\sigma$$-donor character
C
are having good $$\pi$$-donating ability
D
are having poor $$\sigma$$-donating ability
2
JEE Main 2022 (Online) 27th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

$$\mathrm{Fe}^{3+}$$ cation gives a prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of :

A
$$\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]_{2}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$$
B
$$\mathrm{Fe}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{2}$$
C
$$\mathrm{Fe}_{3}\left[\mathrm{Fe}(\mathrm{OH})_{2}(\mathrm{CN})_{4}\right]_{2}$$
D
$$\mathrm{Fe}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{3}$$
3
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The metal complex that is diamagnetic is (Atomic number: $$\mathrm{Fe}, 26 ; \mathrm{Cu}, 29)$$

A
$$\mathrm{K}_{3}\left[\mathrm{Cu}(\mathrm{CN})_{4}\right]$$
B
$$\mathrm{K}_{2}\left[\mathrm{Cu}(\mathrm{CN})_{4}\right]$$
C
$$\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{4}\right]$$
D
$$\mathrm{K}_{4}\left[\mathrm{FeCl}_{6}\right]$$
4
JEE Main 2022 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The correct order of energy of absorption for the following metal complexes is :

A : [Ni(en)3]2+ , B : [Ni(NH3)6]2+ , C : [Ni(H2O)6]2+

A
C < B < A
B
B < C < A
C
C < A < B
D
A < C < B
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