Which of the following statements are NOT correct?

Chemistry
,
#1

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 H-H bond dissociation enthalpy is lowest as compared to a single bond between two atoms of any element.

E. Hydrogen reduces oxides of metals that are more active than iron.

Choose the most appropriate answer from the options given below:

  1. A, B, C only

  2. B, C, D, E only

  3. B, D only

  4. D, E only

#2

The correct answer is (4) D, E only. The H-H bond dissociation enthalpy can not be lowest because bond formed between hydrogen atoms is due to overlapping of 1s-1s. And Hydrogen can not reduce oxides of metals that are more active than iron.