What is Milk of Magnesia.

Milk is -

What is an ore?

What is ppm?

What is logic gates? What are the different types of common logic gate?

What is a junction transistor. What are the different types of transistors? Show their schematic representation.

What is edema?

What are chiasmata? What is their significance?

What is ferromagnetism? What are the ferromagnetic substance?