Multiple choice

Carbon tetrachloride fire extinguisher should not be used in closed room because it produces a poisonous gas called ____.

  1. Carbon Monoxide

  2. Phosphine

  3. Phosgene

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbon tetrachloride decomposes at high temperatures to form phosgene gas (COCl2), which is highly toxic. The question asks what gas is produced, and since phosgene is not listed as an option, the correct choice is 'None of these' - meaning the actual gas (phosgene) is not among the given choices.

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