Which of the following potassium compounds is known as "Pearl ash"

Options

A. `KOH`
B. `KMnO_(4)`
C. `K_(2)CO_(3)`
D. `K_(2)SO_(4)`

Answer

To determine which potassium compound is known as "Pearl ash," we can analyze the given options step by step.

### Step 1: Identify the compounds
We have the following potassium compounds to consider:
- KOH (Potassium hydroxide)
- KMnO4 (Potassium permanganate)
- K2CO3 (Potassium carbonate)
- K2SO4 (Potassium sulfate)

### Step 2: Research the common names
Next, we need to know the common names of these compounds:
- KOH is known as caustic potash.
- KMnO4 is known as potassium permanganate.
- K2CO3 is known as pearl ash.
- K2SO4 is known as potassium sulfate.

### Step 3: Match the common name with the compounds
From our research:
- K2CO3 is identified as pearl ash.

### Step 4: Conclusion
Thus, the potassium compound that is known as "Pearl ash" is **K2CO3 (Potassium carbonate)**.

### Final Answer:
The correct answer is **K2CO3**.

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