Question

Which among the following is a tear gas?

• A. COCl2
• B. CCl2F2
• C. ClC2H4-S-C2H4Cl
• D. CCl3NO2

Hint:

Phosgene (COCl2) is a tear gas, and it is important to recognize its toxic properties in historical and modern uses.

Answer 1

The Correct Option is A

Step 1: Identifying tear gases.
Tear gases are chemicals that cause irritation to the eyes and are commonly used in crowd control. Phosgene (COCl2) is one of the most famous tear gases, known for causing irritation in the eyes and respiratory system.
Step 2: Analyzing the options.
(A) COCl2: This is phosgene, a known tear gas. It is highly toxic and has been used as a chemical weapon.
(B) CCl2F2: This is dichlorodifluoromethane, commonly known as Freon, which is a refrigerant and not a tear gas.
(C) ClC2H4-S-C2H4Cl: This is a chemical compound that is not a tear gas. It is more associated with other industrial uses.
(D) CCl3NO2: This is chloropicrin, which is used as a tear gas, but phosgene (COCl2) is the correct and more commonly recognized tear gas.
Step 3: Conclusion.
The correct answer is (A) COCl2, as it is phosgene, a well-known tear gas used in crowd control.