Describe how coal is formed from dead vegetation. What is this process called ?

What is pyro metallurgy? Describe the conditions of the equation used in this process.

Where does non-cyclic photophosphorylation take place? Describe this process. Why is this process called so?

A rod of 2 cm in height is held in front of a convex lens. The, image formed at a distance 60 cm and object at 10 cm from the mirror. What is the focal length of the lens ?

Name the catalyst used for conversion of SO_2 to SO_3 in the contact process. How is oleum formed from SO_3 in this process?

How many 5-member commitees can be formed from 8 teachers and 3 students so that a particular teacher is always selected for each committee?

What is the conventional direction of current? How does it differ from the actual motion of charge carrier inside a current-carrying conductor?

Describe the role of the following in the processes mentioned: NaCN in the extraction of silver forms silver ore.