Solid state -2

Shottkey defect is exhibited by compounds with

• low coordination number , small size of cations

• low coordination number , same size of ions

• high coordination number, same size of ions

• high coordination number, small size of cations

Li vapors heated in LICl gives

• purple

• pink

• yellow

• None of the above

P can enter the crystal structure of group 14 element forms

• P type semi conductor

• N- type semi conductor

In Metal the difference of energy between valence band and conduction band

• is negligible

• is small

• is large

• None of the above

------------------are attracted by a magnetic field but lose their magnetism in the absence of the magnetic field.

• diamagnetic

• ferromagnetic

• paramagnetic

• ferrimagnetic

----------------show permanent magnetism even when the magnetic field is removed

• paramagnetic

• antiferro magnetic

• ferri magnetic

• ferro magnetic

Peizo electricity example

• sodium potassium tartarate

• lead zirconate

• Barium titanate

• and Potassium dihydrogen phosphate

Coordination number of Cu

• 6

• 4

• 12

• 8

Diamond crystalises in

• bcc

• fcc

• simple cube

• None of the above

The coordination number of C in graphite is

• 3

• 4

• 6

• 8