Chlorine gas turns damp starch-iodide paper?

A. pink
B. colourless
C. red
D. dark blue

Correct Answer:

Option D – dark blue

Explanation

The simplest test for chlorine is a litmus paper test, chlorine will turn a damp blue litmus paper red, and then it’ll bleach it white, there are other tests you can perform.

For example, chlorine will turn damp starch-iodide paper which is white to a blue-black color.