Hello there, Statement in my book reads as " a reaction in which two atoms or molecules combine together to form a third molecule is a combination reaction, and for this reaction to be redox reaction, either one of A and B must be in elemental form.
                      A+B=C
Why underlined text is an essential requirement if we want to have a redox combination reaction,
Please Exlain with examples why can't we have both A and B in non-elemental form.

Asked by Nirbhay | 1st Nov, 2014, 11:23: PM

Expert Answer:

Dear oneworld191@gmail.com

Thanks for asking us a question in Ask the Expert section of TopperLearning.com.

For a combination reaction to be a redox reaction, either A or B or both A and B must be in elemental form. If they both are in non-elemental form as shown in below example:

2Cu2O(s) + Cu2S(s)   →   6Cu(s) + SO2(g)  (It is a redox reaction)

then the reaction will no longer remain as combination reaction. Due to this reason either A or B or both A and B must be in elemental form. It is a mandatory condition.

Regards

Topperlearning Team.

Answered by Arvind Diwale | 3rd Nov, 2014, 01:22: PM

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