Which among the following would cause the bright red colour due to bursting of crackers?
- ASodium
- BSulphur
- CMagnesium
- DStrontium
- ENone of the above/More than one of the above
Show answer and explanation
Correct answer: (d) Strontium
Explanation
Firework colours come from metal salts excited by heat, which emit characteristic flame colours.
Strontium compounds (e.g. strontium carbonate) give the bright red colour.
Distractors: sodium gives yellow, magnesium a brilliant white, and copper gives blue.