If crimson flame is given when an inorganic mixture is tested by flame test, it may be due to the presence of

Options

A. potassium
B. strontium
C. barium
D. calcuim

Explanation

To determine the cause of a crimson flame observed during a flame test for an inorganic mixture, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Flame Test**: The flame test is a qualitative analysis technique used to identify the presence of certain metal ions based on the color of the flame produced when the sample is heated.

2. **Identifying the Color**: The question specifies a "crimson flame." This color is characteristic of certain metal ions when subjected to a flame test.

3. **Common Metal Ions and Their Flame Colors**:
- Potassium (K) produces a violet flame.
- Strontium (Sr) produces a crimson red flame.
- Barium (Ba) produces an apple green flame.
- Calcium (Ca) produces a brick red flame.

4. **Analyzing the Options**: Since the question specifically mentions a crimson flame, we need to identify which metal ion corresponds to this color. From the list:
- Strontium is the only metal ion that produces a crimson red flame.

5. **Conclusion**: Therefore, the presence of strontium in the inorganic mixture is responsible for the crimson flame observed during the flame test.

### Final Answer:
The crimson flame in the flame test may be due to the presence of **Strontium (Sr)**.

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