Solid state

Which solids are also called pseudo solid?

• Amorphous

• crystalline

• regular solid

• true solid

Atom arranged in simple unit cell at:-

• Corners

• face

• in body

• none of these

Co-ordination no. in 1-D packing

• 2

• 4

• 5

• 3

Formula of radius ratio rule:-

• radius of anion/ radius of cation

• radius of cation/ radius of anion

• Area of cation/ radius of anion

• none of these

Which metal is ferromagnetic:-

• Zn

• Mg

• Fe

• Pb

What is Doping?

• adding purities

• adding impurities

• decrease conductivity

• all of these

Acc. to band theory Insulators have:-

• small energy gap

• touching band

• large energy gap

• substituting band

In Frenkel defect the effect on density will be:-

• increase

• decrease

• no change

• both (a) and(b)

Which type of defect shown by Ionic solid?

• Vacancy

• Schottky

• Frenkel

• both b and c

Metal deficiency defect due to:-

• missing of anion

• excess of cation

• missing of cation

• both a and b