Chemistry · Hydrogen and its Compounds

NEET (UG) 2023 — Question 179

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 elements.

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

Choose the most appropriate answer from the options given below:

Answer: B

Statement A, B, C are correct

(D) H – H bond dissociation energy is maximum as compared to single bond between two atom

of any element. (E) Hydrogen reduces oxides of metal that are less active than iron.

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