1
BITSAT 2024
MCQ (Single Correct Answer)
+3
-1

Match List I with List II.

List I
$($ Complex)
List II
(Oxidation
number of metal)
A. $\mathrm{Ni}(\mathrm{CO})_4$ I. +1
B. $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_5 \mathrm{NO}\right]^{2+}$ II. Zero
C. $\left[\mathrm{Co}(\mathrm{CO})_5\right]^{2-}$ III. -1
D. $\left[\mathrm{Cr}_2(\mathrm{CO})_{10}\right]^{2-}$ IV. -2

Choose the correct answer from the options given below:

A
A-II, B-I, C-IV, D-III
B
A-II, B-IV, C-I, D-III
C
A-II, B-III, C-I, D-IV
D
A-I, B-II, C-IV, D-III
2
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

The complex showing a spin-only magnetic moment of $$2.82 \mathrm{~BM}$$ is

A
$$\left[\mathrm{Ni}(\mathrm{Cl})_4\right]^{3-}$$
B
$$\left[\mathrm{NiCl}_4\right]^{2-}$$
C
$$\mathrm{Ni}\left(\mathrm{PPh}_3\right)_4$$
D
$$\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$$
3
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

The correct statement with respect to the complexes $$\mathrm{Ni}(\mathrm{CO})_4$$ and $$[\mathrm{Ni}(\mathrm{CN})_4]^{2-}$$ is

A
nickel is in the same oxidation state in both.
B
Both have square planar geometry.
C
have square planar and tetrahedral geometry, respectively.
D
have tetrahedral and square planar geometry, respectively.
4
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

What is the hybridisation of [CrF6]3$$-$$ ?

A
sp3d
B
sp3d2
C
d2sp3
D
d2sp
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