When pink crystalline compound was heated, the solid changed colour from pink to blue and steam was driven off. After the tube had cooled down, water was added to the contents of the test tube and the pink colour returned. Which term describes the change that took place?

that tool would be a compass

here are some of the ways in which chemical and nuclear reactions differ.

explanation:

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.