Read the following statements
- Trivalent chromium has relatively low aqueous solubility, and low mobility in the soil environment. By contrast, hexavalent chromium has a higher aqueous solubility and greater mobility in the soil environment.
- The chemical reaction between trivalent chromium and zero-valent iron will result in transformed version called hexavalent chromium.
- Hexavalent chromium is a known carcinogen.
- Trivalent chromium has relatively higher human toxicity as compared to hexavalent chromium.
The correct choice is
- IV is correct; I and III are incorrect
- II is correct; I and IV are incorrect
- I and III are correct; II and IV are incorrect
- I, II and IV are correct; III is incorrect
