In semiconductors at room temperature,

Three semiconductors are arranged in the increasing order of their energy gap as follows. The correct arrangement is:

Read the following statements carefully:
$Y:$ The resistivity of a semiconductor decreases with an increase in temperature.
$Z:$ In a conducting solid,the rate of collision between free electrons and ions increases with an increase in temperature.
Select the correct statement from the following:

The manifestation of band structure in solids is due to

The probability of electrons to be found in the conduction band of an intrinsic semiconductor at a finite temperature:

Give a classification of semiconductors and write examples of each.