Which of the following statements are NOT cor | vedclass

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(D) Statement $A$ is correct: Hydrogen acts as a reducing agent for heavy metal oxides.Statement $B$ is correct: Heavy water $(D_2O)$ is used as a tra

Vedclass · Accepted Answer

$D, E$ only

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(D) Statement $A$ is correct: Hydrogen acts as a reducing agent for heavy metal oxides.Statement $B$ is correct: Heavy water $(D_2O)$ is used as a tracer to study reaction mechanisms.Statement $C$ is correct: Hydrogenation of oils produces saturated fats (vanaspati ghee).Statement $D$ is incorrect: The $H-H$ bond dissociation enthalpy $(435.88 \ kJ \ mol^{-1})$ is actually the highest for a single bond between two atoms of any element.Statement $E$ is incorrect: Hydrogen can only reduce oxides of metals that are less active than iron (e.g.,$Cu, Pb, Ag$). It cannot reduce oxides of highly active metals like $Na, K, Ca$.Therefore,statements $D$ and $E$ are incorrect.

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