Q. What is the boundary zone when two different type of air masses meet called?
Answer: Front
Notes: The boundary zone when two different type of air masses meet is called a Front. The process of its formation is known as frontogenesis.

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 14 in Climatology - Air Masses, Fronts, Cyclones and Related Phenomena in above course in App.