Band theory predicts that magnesium is an insulator. However, in practice it acts as a conductor due to
A. presence of filled 3s - orbital
B. overlap of filled 2p and filled 3s - orbital
C. overlap of filled 3s and empty 3p - orbital
D. presence of unfilled 3p - orbital
Answer: Option C
This Question Belongs to Engineering Chemistry >> Chemical Bonding And Molecular Structure
Which of the following species has two non-bonded electron pairs on the central atom?
A. TeCI4
B. CIF3
C. lCl2
D. PCl3
The spinels CoFe2O4 and FeFe2O4 respectively are
A. inverse and inverse
B. inverse and normal
C. normal and normal
D. normal and inverse
The arrangement of sulphur in zinc blende and wurtzite structures, respectively are
A. hexagonal close packing and cubic close packing
B. cubic close packing and hexagonal close packing
C. simple cubic packing in both the structures
D. hexagonal dose packing in both the structures
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