MCQ
In $Fe(CO)_5$ , the $Fe—C$ bond has
- AIonic character
- B$\sigma -$ character only
- C$\pi -$ character only
- ✓both $\sigma $ and $\pi $ character
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$(a)$ Lewis acidity order : $SiF_4 < SiC_{4} < SiBr_4 < Sil_4$
$(b)$ Melting point : $NH_3 > SbH_3 > AsH_3 > PH_3$
$(c)$ Boiling point : $NH_3 > SbH_3 > AsH_3 > PH_3$
$(d)$ Dipole moment order : $NH_3 > SbH_3 > AsH_3 > PH_3$