The oxide of which of the following elements will be acidic in character

Options

A. Mg
B. Rb
C. Li
D. Cl

Answer

To determine which oxide is acidic in character, we need to analyze the elements provided in the options: magnesium, rubidium, lithium, and calcium. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand Acidic Oxides
Acidic oxides are typically formed by nonmetals or certain metalloids that can accept electrons. These oxides react with water to form acids or react with bases to form salts.

### Step 2: Identify the Elements
The elements given in the options are:
- Magnesium (Mg)
- Rubidium (Rb)
- Lithium (Li)
- Calcium (Ca)

### Step 3: Classify the Elements
- **Magnesium**: This is an alkaline earth metal.
- **Rubidium**: This is an alkali metal.
- **Lithium**: This is also an alkali metal.
- **Calcium**: This is another alkaline earth metal.

### Step 4: Determine the Nature of Their Oxides
- **Alkali Metals (Li, Rb)**: Generally form basic oxides.
- **Alkaline Earth Metals (Mg, Ca)**: While magnesium can form amphoteric oxides, calcium oxide (CaO) is also basic.

### Step 5: Identify the Correct Element
None of the metals listed (Mg, Rb, Li, Ca) typically form acidic oxides. However, if we consider the possibility of a nonmetal oxide, we realize that chlorine (not listed in the options) would be a better candidate for forming acidic oxides, as it is a nonmetal and can accept electrons.

### Conclusion
Based on the analysis, none of the provided options (magnesium, rubidium, lithium, calcium) will form acidic oxides. However, if we were to include chlorine, it would be the correct answer.

### Final Answer
None of the options provided (Mg, Rb, Li, Ca) will form acidic oxides.

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