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Which chemical is used to give green colour to firecrackers?
1. strontium carbonate
2. calcium chloride
3. sodium nitrate
4. barium chloride

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Correct Answer - Option 4 : barium chloride

The correct answer is ​barium chloride.

  • Barium chloride is referred to as the inorganic compound.
  • The chemical formula of barium chloride is BaCl2.
  • It is made of Barium cations and chloride anions.
  • It is white, toxic, and imparts a yellow-green colouration to the flame.
  • The compound is soluble in methanol and insoluble in ethanol and ethyl acetate.
  • It is used in the purification of brine solution in a caustic chlorine plant.
  • Since the compound is toxic in nature, its toxicity limits its application.
  • The BaCl2 crystallizes in two forms namely cubic Flourite and orthorhombic cotunnite.
  • The compound is also called Barium Muriate and Barium dichloride.

  •  Some other important uses of barium chloride include -
  1. It is used in the hardening of steel.
  2. It is used in the paper-making industry.
  3. It is widely used in oil refining.
  4. It is also used in the manufacturing of rubber.

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