GENERAL KNOWLEDGE

Detailed explanation-1: -The correct answer is Barium. Metal salts commonly used in firework displays include calcium chloride, sodium nitrate, barium chloride, copper chloride, etc. The green flame produced in fire-works is due to the presence of Barium.

Detailed explanation-2: -Barium chloride (green) is unstable at room temperatures, so barium must be combined with a more stable compound (e.g., chlorinated rubber). In this case, the chlorine is released in the heat of the burning of the pyrotechnic composition, to then form barium chloride and produce the green color.

Detailed explanation-3: -Barium is used to create green colors in fireworks, and it can also help stabilize other volatile elements. Carbon is one of the main components of black powder, which is used as a propellent in fireworks.

Detailed explanation-4: -A green flame, for instance, indicates the presence of copper. As copper heats up, it absorbs energy that’s manifested in the form of a green flame. A pink flame, on the other hand, indicates the presence of lithium chloride. And burning strontium chloride will create a red flame.