SSC CGL (Prelims) General: Chemistry questions with solutions

Q1. Which chemical element produces a green colour in firework displays?

1. Strontium
2. Barium
3. Sodium
4. Copper

Answer: Barium

Barium compounds emit a green colour when heated, so they are used in fireworks for green effects. Strontium gives red, sodium gives yellow, and copper often gives blue-green shades.