The chemical formula of lime is

Options

A. calclum hydroxide
B. calcium hypochloride
C. calclum carbonate
D. calclum oxide

Answer

To determine the chemical formula of lime, we can follow these steps:

### Step 1: Identify the options provided
The options given for the chemical formula of lime are:
- A) Calcium hydroxide (Ca(OH)₂)
- B) Calcium hypochlorite (Ca(OCl)₂)
- C) Calcium carbonate (CaCO₃)
- D) Calcium oxide (CaO)

### Step 2: Understand what lime is
Lime commonly refers to calcium oxide, which is also known as quicklime. It is important to differentiate between various compounds containing calcium.

### Step 3: Analyze the options
- **Calcium hydroxide (Ca(OH)₂)**: This is also known as slaked lime, not quicklime.
- **Calcium hypochlorite (Ca(OCl)₂)**: This is used for bleaching and disinfecting, not lime.
- **Calcium carbonate (CaCO₃)**: This is limestone or chalk, which is a precursor to lime but not lime itself.
- **Calcium oxide (CaO)**: This is indeed known as lime or quicklime.

### Step 4: Confirm the correct answer
Based on the analysis, the correct chemical formula for lime is **Calcium oxide (CaO)**.

### Final Answer
The chemical formula of lime is **CaO**.

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