Praxis II General Science

Category - Chemistry

In the following reaction, which chemical species is a reaction intermediate?

Step 1: H2O2 (aq) + Br- (aq)  H2O (aq) + OBr- (aq)
Step 2: H2O2 (aq) + OBr- (aq) 
H2O (aq) + Br- (aq) + O2 (g)

  1. H2O2
  2. O2
  3. H2O
  4. OBr-
  5. H2
Explanation
Answer: D - In this 2-step reaction, OBr- is a reaction intermediate. Reaction intermediates are chemical species found as a product of the first reaction, and a reactant in the second reaction.
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