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1
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following complexes is diamagnetic and square planar?

A
$$\left[\mathrm{CoF}_6\right]^{3-}$$
B
$$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$$
C
$$\left[\mathrm{NiCl}_4\right]^{2-}$$
D
$$\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$$
2
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Identify the number of unpaired electrons present and geometry respectively of [Co(NH$$_3$$)$$_6$$]$$^{3+}$$ complex.

A
0, square planar
B
2, square planar
C
4, octahedral
D
0, octahedral
3
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which among the following statements about $$\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$$ is $$\underline{\text { NOT }}$$ true?

A
In this electrons are paired prior to hybridization.
B
Ni undergoes $$\mathrm{dsp}^2$$ hybridization.
C
Oxidation state of $$\mathrm{Ni}$$ is +6 .
D
It is a square planar complex.
4
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify homoleptic complex from following.

A
$$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$$
B
$$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \mathrm{SO}_4$$
C
$$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$$
D
$$\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)\left(\mathrm{NH}_3\right)_5\right] \mathrm{I}_3$$
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