The metal that produces red violet colour in the non - luminous flame is

Options

A. `Zn`
B. `Ag`
C. `Rb`
D. `Pb`

Answer

To determine the metal that produces a red violet color in a non-luminous flame, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Flame Colors**: Different metals produce characteristic colors when heated in a flame due to the excitation of their outermost electrons. When these electrons return to their original energy levels, they emit light of specific wavelengths, which corresponds to different colors.

2. **Identifying the Relevant Metals**: We need to focus on metals that are known to produce specific flame colors. Common metals and their flame colors include:
- Sodium (Na) - Yellow
- Potassium (K) - Lilac
- Lithium (Li) - Crimson red
- Strontium (Sr) - Red
- Barium (Ba) - Green
- Copper (Cu) - Blue-green

3. **Focusing on Red Violet Color**: The question specifically asks for a metal that produces a red violet color. Among the common alkali metals, Potassium (K) is known to produce a lilac or red violet color in a non-luminous flame.

4. **Conclusion**: Based on the information about flame colors, the metal that produces a red violet color in a non-luminous flame is Potassium (K).

### Final Answer:
The metal that produces red violet color in the non-luminous flame is Potassium (K).

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