MCQ
A cyclic skeleton of silicon and oxygen can constructed by the silicate ion composition
- A$Si_2O_7^{4-}$
- B$Si_2O_5^{2-}$
- ✓$SiO_3^{2-}$
- D$SiO_4^{4-}$
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$(i)$ $[Cr(NO_3)_3(NH_3)_3]$
$(ii)$ $K_3[Co(C_2O_4)_3]$
$(iii)$ $K_3 [CoCl_2(C_2O_4)_2]$
$(iv)$ $[Co BrCl(en)_2]$
$(a)$ 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


$X-Y-Z$
