Which statement about chromium VI's hazard is true?

• A. It is not toxic at all
• B. It is highly toxic and carcinogenic
• C. It is only dangerous in moisture
• D. It is only hazardous to aquatic life

Answer: (B)

Hexavalent chromium is highly toxic and a known carcinogen. These compounds pose serious health risks, especially when inhaled, and can cause cancer and other organ damage. That is why the statement describing chromium VI’s hazard as highly toxic and carcinogenic is the correct choice.

The other descriptions don’t fit because chromium VI compounds are not harmless in any form; some forms irritate skin and eyes and can injure the lungs, liver, or kidneys, and the carcinogenic risk is well established. It isn’t only dangerous in moisture—while moisture can influence the chemical form in some contexts, a dry form can still be a health hazard through inhalation, dermal contact, or ingestion. It’s also not limited to aquatic life concerns; chromium VI is a recognized hazard to humans as well as to aquatic organisms, so saying it’s only hazardous to aquatic life misses the primary health risk.