Question

Name an element that burns in air with a bright blue flame.

Answer 1

An element that burns in air with a bright blue flame is:

• $\mathrm{Sulphur}\left[\mathrm{S}\right]$: Sulphur burns with a blue flame concomitant with the formation of sulphur dioxide notable for suffocating odour. The principal sulphur oxides are sulphur dioxide and sulphur trioxide.