Question

Far ultraviolet region generally lies between? a. 10-200 nm b. 200-400 nm c. 400-750 nm d. 300-500 nm

Answer 1

I think this is b.

Explanation:

A bit like your question on IR, different sources give different answers ranging from `300 to 400nm` to `200 to 400nm`

Again, my old Chemistry books came to rescue (Organic Chemistry, Pine) which state that the "uv region of interest to chemists lies between `200nm to 400nm`" so I would go for b.