Explain and elaborate the difference between zener and avalanche breakdown voltage

1)Define Drift and Diffusion current in Semiconductor. 2. Why n - type impurities are called as Donor impurities? 3. Give the other names of depletion region? (At least Two) 4. General Purpose Diodes are mostly preferred in chopper circuits. Is it True? Justify.

GaAs, InP, and InGaAs are examples of what kind of semiconductor materials?

Suppose we just connected an n type and p type semiconductor together. What happens at the junction? Briefly explain with appropriate figure.

Explain briefly but clearly how to identify the anode and cathode of a semiconductor diode?

When does a diode act like an ideal switch? Explain.

What is the reason for the difference between theoretical and practical values  diode in  dynamic resistance?

Do you understand the connection between a diode and an LED and semiconductors? Put the symbol and some background information on a graph?

What happens if a voltage above the normal operating voltage is applied to the diode?

Zener voltage refers to   a. the reverse breakdown voltage b. the forward breakdown voltage c. the break-over voltage d. the break-back voltage