Write short note on Structural Isomerism

Write short note on BOD

Write short note on: Prototheria

Write a short note on microwaves.

Write short notes on Emulsion

Write a short note on acid rain.

Write a short note on optical fibre.

Write a short note on atomic spectra.

Write short notes on: Hemi acetal formation

Write a short note on ultraviolet rays. Describe how it in large quantities has harmful effects on human.

Write a short note on resonance.