1
MHT CET 2022 11th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is the number of unpaired electrons in $$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$$ complex?

A
Four
B
Two
C
Zero
D
Six
2
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is oxidation state of cobalt in a coordination complex if it's EAN is 36 and the value of C.N. is 6 (Given: Atomic number of cobalt = 27).

A
+4
B
+2
C
+1
D
+3
3
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which among the following is a correct order of increasing field strength of ligands?

A
$$\mathrm{I^-}<\mathrm{OH}^{-}<\mathrm{NH}_3<\mathrm{S}^{2-}$$
B
$$\mathrm{NH}_3<\mathrm{OH}^{-}<\mathrm{I}<\mathrm{S}^{2-}$$
C
$$\mathrm{OH}^{-}<\mathrm{S}^{2-}<\mathrm{\Gamma}<\mathrm{NH}_3$$
D
$$\mathrm{I}^{-}<\mathrm{S}^{2-}<\mathrm{OH}^{-}<\mathrm{NH}_3$$
4
MHT CET 2021 24th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which among the following cations will form lowest stability complex if the ligand remains the same?

A
$$\mathrm{Cu}^{2+}$$
B
$$\mathrm{Fe}^{2+}$$
C
$$\mathrm{Cd}^{2+}$$
D
$$\mathrm{Ni}^{2+}$$
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