Question

What is the key characteristic of an oxidation–reduction reaction?

Answer 1

Electrons are excharged

Answer 2

The key  characteristic  of oxidation-  reduction   reaction  is electrons   are  exchanged  ( answer  C)

   Explanation

• Oxidation-reduction   reaction  is type  of reaction  that involve a transfer  of electrons  between two  species.

Example  of oxidation - reduction  reaction is

  CH4  +2O2 →   CO2  + 2H2O

  from reaction above C  atom  is oxidized  from  oxidation state -4  to 4.

   On the  other hand O atoms   are reduced  from oxidation state of 0 to  2-.  therefore   there is exchange  of electrons  between  C atoms  and O atoms.

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