Question

two chemistry students are investigating the properties of quartz crystals. they are most likely studying in the field of
biochemistry.
inorganic chemistry.
organic chemistry.
physical chemistry.
other.

Explanation:

Quartz ($SiO_2$) is an inorganic compound. Inorganic chemistry deals with the properties and reactions of inorganic compounds. Biochemistry focuses on chemical processes in living organisms, organic chemistry on carbon - containing compounds mainly of biological origin, and physical chemistry on the physical principles underlying chemical systems. Since quartz is an inorganic substance, the relevant field is inorganic chemistry.

Answer:

B. inorganic chemistry