JAMB Biology 2015 Objective — Question 19

Question 19 of 50 from the Joint Admissions and Matriculation Board (JAMB) Biology 2015 Objective paper, with the correct answer and a full explanation.

H₂S(g) + Br₂(g) → 2HBr(g) + S(s). In the reaction above, the oxidizing agent is

A. H₂S(g)
B. S(s)
C. Br₂(g)Correct
D. HBr(g)

Explanation

The oxidation number of bromine decreases from 0 in Br₂ to −1 in HBr (reduction), so Br₂ is the oxidizing agent, while H₂S is the reducing agent.

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