Question

The number of electrons involved when 1 mole of H2O2 , H2O2 decomposes to give H2O + O2, is

Answer 1

Answer:

1 electron

Explanation:

here in the equation we will consider the O.S of oxygen so as it is a disproportionation reaction so oxygen is in 3 O.S namely -1 ,0 and -2.

so we can see that it has losed 1 electron from -1 to 0 and gained 1 electron from -1 to -2.

Thus the correct answer is 1 electron

Answer 2

One electron is involved in the decomposition of one mole of hydrogen peroxide.

• The decomposition reaction of hydrogen peroxide is a slower process at room temperature but in presence of a catalyst, the reaction takes place at a faster rate.
• The reaction is as follows-
• $H_2O_2\rightarrow H_2O+\dfrac{1}{2}O_2$
• In this reaction, the oxidation state of hydrogen peroxide changes from -2 to -1 and 0 in water and oxygen respectively.
• So, one electron is involved in the reaction.