What is calcination? Explain.

What is menstruation? Explain.

What is predation? Explain the characteristic of predation.

What is codominance? Explain with reference to human blood group.

What is evolution? Explain the three evidences for evolution.

What is roasting ? Explain.

Differentiate between roasting and calcination. Explain the two with the help of suitable chemical equatiosn. How is zinc extracted from its ore?