The elements of group II are known as alkaline earth metals. The electronic configuration of these elements . The electronic configuration of these elements is `ns^(2)` and oxidation state is `+2`. They have higher ionization energy than alkali metals in their respective period due to their small size and completely filled s-orbital. These elements give characteristic colour to bunsen flame. magnesium is used in the preparation of Grignard agent (RMgX) which is used in organic chemistry for preparation of sevaral organic compounds like alcohols. acids, hydrocarbons.
Q. Brick red colour of flame test is gives by

Options

A. Sr
B. Ba
C. Ca
D. Mg

Answer

To determine which alkaline earth metal gives a brick red color during a flame test, we can follow these steps:

### Step 1: Understand the Flame Test
The flame test is a qualitative analysis technique used to identify the presence of certain metal ions based on the characteristic colors they emit when heated in a flame. When metal salts are heated, their electrons absorb energy and get excited to higher energy levels. When these electrons fall back to their original levels, they emit light of specific wavelengths, which corresponds to different colors.

**Hint:** Remember that different metals emit different colors when heated, and this is due to the excitation and relaxation of their electrons.

### Step 2: Identify the Alkaline Earth Metals
The alkaline earth metals include Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), and Barium (Ba). Each of these metals has a unique flame color.

**Hint:** Familiarize yourself with the colors associated with each alkaline earth metal in flame tests.

### Step 3: Recall the Characteristic Colors
- **Barium (Ba)**: Green color
- **Calcium (Ca)**: Brick red color
- **Strontium (Sr)**: Crimson red color
- **Magnesium (Mg)**: No color

**Hint:** Focus on the specific colors associated with each metal, especially the one that matches "brick red."

### Step 4: Analyze the Options
The options provided are:
- (1) Sr (Strontium)
- (2) Ba (Barium)
- (3) Ca (Calcium)
- (4) Mg (Magnesium)

From our recall of characteristic colors, we see that Calcium (Ca) is known for producing a brick red color in flame tests.

**Hint:** Compare the options against the known colors to find the one that matches "brick red."

### Step 5: Conclusion
Based on the information gathered, the alkaline earth metal that gives a brick red color during the flame test is **Calcium (Ca)**.

**Final Answer:** The correct option is (3) Ca (Calcium).