Which of the following statements are not correct?A. Hydrogen is used to reduce heavy metal oxides to metals.B. Heavy water is used to study reaction mechanism.C. Hydrogen is used to make saturated fats from oils.D. The bond dissociation enthalpy is lowest as compared to a single bond between two atoms of any elements.E. Hydrogen reduces oxides of metals that are more active than iron.Choose the correct answer:
- AB, D only
- BD, E only
- CA, B, C only
- DB, C, D, E only
Solution & Step-by-step Explanation
1. A, B, and C are correct uses/properties of hydrogen/heavy water.2. Statement D is incorrect: The bond has a very high dissociation enthalpy () for a single bond, which is why it is relatively unreactive at room temperature.3. Statement E is incorrect: Hydrogen can only reduce oxides of metals that are less active than it in the reactivity series (like ). It cannot reduce oxides of very active metals like or .Incorrect statements are D and E.