Question

which is a pale yellow substance that produces a strong unpleasent smell when it burns and is used in medicine and industry. ​

Answer 1

Phosphene gas is a pale yellow substance that produces a strong unpleasant smell when it burns.

• Phosgene gas may appear colourless or as a white to the pale yellow cloud.
• At low concentrations, it has a pleasant odour of newly mown hay or green corn, but its odour may not be noticed by all people exposed.
• At high concentrations, the odour may be strong and unpleasant.
• Phosgene is a major industrial chemical used in the production of plastics, dye and pesticides.
• It is also used in the pharmaceutical industry.