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Barium salts impart colour to the flame....

Barium salts impart _________colour to the flame.

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To answer the question "Barium salts impart _________ colour to the flame," we can follow these steps: 1. **Identify the Element**: Recognize that barium is an alkaline earth metal, which is part of Group 2 in the periodic table. 2. **Understand Flame Tests**: Recall that certain metal salts produce characteristic colors when heated in a flame. This is due to the excitation of electrons in the metal ions. 3. **Research Barium Salts**: Look into the specific behavior of barium salts when subjected to a flame. Barium salts, such as barium nitrate, barium carbonate, and barium chloride, are known to produce a specific color. 4. **Determine the Color**: From the knowledge of flame tests, it is established that barium salts impart a green color to the flame. 5. **Conclude the Answer**: Therefore, the complete answer to the question is that barium salts impart a **green** color to the flame. Final Answer: Barium salts impart **green** colour to the flame. ---
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