Question

Mark the correct statement from the following:

• A. Copper metal can be oxidized by $Zn^{2 +}$ions.
• B. Oxidation number of phosphorus in $P_{4}$is 4.
• C. An element in the highest oxidation state acts only as a reducing agent.
• D. The element which shows highest oxidation number of +8 is Os in $OsO_{4}$.

Answer 1

Answer: (D)

The element which shows highest oxidation number of +8 is Os in $OsO_{4}$.

Answer 2

: Cu cannot be oxidised by $Zn^{2 +}$ion, oxidation number of phosphorus is zero. An element in its highest oxidation state acts as an oxidizing agent.