Mention the chemical formulae of
(i) Phosgene
(ii) tear gas and
(iii) chloroform

Explanation

To answer the question regarding the chemical formulae of phosgene, tear gas, and chloroform, we will go through each compound step by step.

### Step 1: Phosgene
- **Common Name**: Phosgene
- **Chemical Name**: Carbonyl dichloride
- **Chemical Formula**:
- The formula is derived from the components: carbon (C), oxygen (O), and chlorine (Cl).
- Phosgene consists of one carbon atom, one oxygen atom, and two chlorine atoms.
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