15. The following is a stable nitrene molecule isolated by Beckmann and coworkers in 2024. What is the oxidation state of N?(A) +1(B) −1(C) +2(D) −3(E) +3

8. Which of the following statements about the complex ion [Co(en)₂Cl₂]⁺ is correct? (en = ethylenediamine)(A) It has two geometric isomers and two optical isomers.(B) Since en is a strong field ligand, the complex ion is paramagnetic.(C) It has cis and trans geometric isomers, but no optical isomers.(D) The geometric isomers of it have similar properties.(E) The oxidation state of Co is +1.

15. The following is a stable nitrene molecule isolated by Beckmann and coworkers in 2024. What is the oxidation state of N?

(A) +1
(B) −1
(C) +2
(D) −3

(E) +3

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