Question

Name a black oxidizing agent which oxidizes concentrated hydrochloric acid to chlorine gas

Answer 1

Answer:manganese dioxide

Explanation:

Answer 2

Answer:

Manganese dioxide  ( $MnO_{2}$ )

Explanation:

• When manganese dioxide reacts with hydrochloric acid, it undergoes a redox reaction (both oxidation and reduction).
• The products formed after the reaction are manganese chloride, water, and chlorine gas.
• The reaction goes as: $MnO_{2} + 4HCl$ → $MnCl_{2} + 2H_{2}O + Cl_{2}$↑
• The chlorine gas thus liberated is yellow-greenish in color.

Hence, a black oxidizing agent which oxidizes concentrated hydrochloric acid to chlorine gas is manganese dioxide ( $MnO_{2}$ ).

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