Chapter 8, Problem 7STP

Interpretation Introduction

Interpretation :

Which is not an oxidation-reduction reaction must be chosen from the given list.

Concept Introduction :

An oxidation-reduction reaction must involve change in oxidation numbers.

Answer to Problem 7STP

Correct answer: Option A is correct.

Explanation of Solution

Reason for correct option:Option A is correct because in precipitation reaction two soluble substances react to produce an insoluble solid or precipitate via double displacement reaction. In this case there is no change in oxidation number of any species involved in the reaction.

Conclusion

Reasons for incorrect options:Option B is incorrect as in synthesis reaction two substances combine to produce a single substance. In this case there is change in oxidation numbers.

Option C is incorrect as in combustion reaction, substance react with oxygen and combustion products are formed. In this case oxidation number change takes place.

Option D is incorrect as in decomposition reaction, one substance is decomposed to more than one substances which involves change in oxidation numbers.