WAEC Chemistry 2019 Objective — Question 32

Question 32 of 50 from the West African Examinations Council (WAEC) Chemistry 2019 Objective paper, with the correct answer and a full explanation.

Consider the following reaction equation: 3Cl2+2NH3→N2+6HCl. NH3 is acting as

A. a reducing agentCorrect
B. a dehydration agent
C. a drying agent
D. An oxidizing agent

Explanation

The oxidation number of nitrogen increases from –3 in NH3 to 0 in N2, meaning NH3 is oxidized; a substance that is oxidized acts as the reducing agent.

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