Band Theory and Types of Solids

Q. 61. 7.38 gram of a sample of metal oxide is quantitatively reduced to 6.84 gram of pure metal. If the specific heat of metal is 0.0332 cal/g^° C. Calculate the valency of the metal.

Q. 12g of metal reacts with oxygen to give 20g of metal oxide. What will be the valency of metal if vapour density is 12??

Q. For n-type semiconductor fermi level is near the conduction band.

1. True
2. False

Q.

What is the order of resistance in the following materials?

1. Conductors $>$Semiconductors$>$Insulators

2. Insulators$>$ Semiconductors$>$Conductors

3. Semiconductors$>$Insulators$>$ Conductors

4. Insulators$>$conductors$>$semiconductors

Q. Which theory is useful in explaining electrical conductivity in conductors and semiconductor?

1. Pauli's principle
2. Avogadro's theory
3. Band theory
4. Hybridistion theory

Q. 12g of metal reacts with oxygen to give 20g of metal oxide. What will be the valency of metal if vapour density is 12??

Q. Which among the following solids are electrical insulators in solid state:

1. Polar molecular solids
2. Ionic solids
3. Non polar molecular solids
4. All of above