Which agent is described as colorless as a vapor and smells like lemon pledge?

Which agent is described as colorless as a vapor and smells like lemon pledge?

• A. Mustard gas
• B. Lewisite
• C. Phosgene
• D. Cyanide gas

Answer: (B)

The main idea here is using how the agent appears and smells to identify it. Lewisite is described as a vesicant that, when released as a vapor, is colorless. In many training references, its odor is noted as distinctly lemon-cleaner-like, similar to lemon pledge. This combination—colorless vapor state plus a lemon-like odor—helps distinguish it from the other agents listed. Mustard gas is typically described by a garlic or mustard odor and can be a liquid that vaporizes; phosgene is colorless but smells like freshly cut hay or grass; cyanide gas has a bitter almond odor. So, the description provided aligns best with Lewisite.

The main idea here is using how the agent appears and smells to identify it. Lewisite is described as a vesicant that, when released as a vapor, is colorless. In many training references, its odor is noted as distinctly lemon-cleaner-like, similar to lemon pledge. This combination—colorless vapor state plus a lemon-like odor—helps distinguish it from the other agents listed. Mustard gas is typically described by a garlic or mustard odor and can be a liquid that vaporizes; phosgene is colorless but smells like freshly cut hay or grass; cyanide gas has a bitter almond odor. So, the description provided aligns best with Lewisite.