MCQ
Acetone can be converted into pinacol by :
- ✓$Mg/Hg/H_2O$
- B$Zn/Hg/HCl$
- C$Na/Hg/H_2SO_4$
- DAll of these

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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 : $NH_3 > SbH_3 > AsH_3 > PH_3$