The correct answer is Barium.
Key Points
- Metal salts commonly used in firework displays include calcium chloride, sodium nitrate, barium chloride, copper chloride, etc.
- The green flame produced in fireworks is due to the presence of Barium.
- The blue flame is due to the presence of Copper.
- The orange flame is due to the presence of Calcium.
- A yellow flame is due to the presence of Sodium.
- Lithium is used to impart a red colour to fireworks.
Additional Information
- Barium (Ba):
- The atomic number is 56.
- It is mostly used in drilling fluids for oil and gas wells and also used in paints and glassmaking.
- It is found in combination with other elements.
- Barite is one of the major ores of Barium.
- Calcium (Ca):
- The atomic number is 20.
- Calcium provides strength to bones and teeth along with vitamins.
- It also plays an important role in blood formation, muscle contraction, clotting of blood, etc.
- Milk, eggs, fish, etc. are the main sources of calcium.
- Lithium (Li):
- Atomic Number is 3.
- Lithium is the lightest metal on the periodic table.
- It is widely used in rechargeable batteries for mobile phones, laptops, digital cameras, etc.
- Chromium (Cr):
- The atomic number is 24.
- It is used in manufacturing stainless steel.
- Chromite is the major ore of Chromium.
- It is a blue-white hard, brittle, and very corrosion-resistant metal and is used to produce several alloys.




