MCQ
Which statement is true for ferrocene?
- AAll $Fe-C$ are of equal length
- BIt has sandwich type structure
- CIt was the first discovered organometallic compound
- ✓All of these

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Intermediates of the reaction is/are
$(a)$ coordination number of $'N'$ is $3$ , and the structure is triagonal planar
$(b)$ formal charge on $N$ is $+1$
$(c)$ Average formal charge on $'O'$ is $-2/3$
$(d)$ Average bond order of $NO$ bond is $4/3$
$(e)$ All $NO$ bond lengths are identical
Correct code is