Which of the following is the odd one out__________________?
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Answer: C. H2S
Explanation
Hydrogen sulfide is a reducing gas and a weak acid found commonly as a toxic pollutant. The other listed options are either strong oxidizing agents or strong oxygen-rich acids. This chemical behavior makes hydrogen sulfide the distinct odd one out among the choices provided. Reducing agents donate electrons during chemical reactions, whereas oxidizing agents accept them readily. Sulfur in hydrogen sulfide has a negative two oxidation state, allowing it to act as a reductant. Oxygen-containing transition metal salts like permanganates and chromates are powerful inorganic oxidizers.
Hydrogen sulfide is famous for its rotten egg odor and is encountered in petroleum refining processes. Analytical chemistry labs use hydrogen sulfide to precipitate metal sulfides in traditional separation schemes. Safety protocols regarding toxic gases are essential when working with volatile sulfur compounds. Sulfuric acid is a strong, oxygen-rich mineral acid that differs from simple reducing gases. Potassium permanganate is a powerful oxidizing salt containing manganese in a high oxidation state. Potassium chromate is another strong oxidizing agent containing chromium in an elevated oxidation state.
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