During roasting the temperature should be kept below its m.p. Why ?

During jogging body temperature rises why?

In the extraction of zinc, during roasting the temperature is kept above 850°C and air current must be controlled because:-

During boiling, the temperature remains constant. Why?

What point should be kept in view during tabulation.

Hot foot stuff should not be kept in polythene containers.Why?

Explain, why an organic liquid vapourises at a temperature below its boiling point in its steam distillation?