How does hydrogen peroxide bleach hair?

A. The H2O2 molecules break the double bonds in pigment molecules.
B. Melanin changes H2O2 molecules to double bonds
C. The H2O2 molecules add hydrogen to melanin
D. The H2O2 molecules add hydrogen and oxygen to melanin

Question 3
What advantage does hydrogen peroxide have over other bleaching agents such as chlorine gas?

A. Hydrogen peroxide decomposes into nontoxic water and oxygen.
B. Hydrogen peroxide decomposes into nontoxic water and hydrogen
C. Hydrogen peroxide decomposes into nontoxic double bonds.
D. Hydrogen peroxide decomposes into nontoxic water only.

Question 4
How does hydrogen peroxide play a role in air pollution?

A. Peroxide fragments react with unburned fuel creating eye irritants.
B. Hydrogen fragments react with unburned fuel creating eye irritants.
C. Oxygen fragments react with unburned fuel creating eye irritants.
D. Water fragments react with unburned fuel creating eye irritants.

Question 5
In the reaction between melanin and hydrogen peroxide, which substance is oxidized (receives electrons)?

Which substance is reduced (loses electrons)?

A. melanin is oxidized,hydrogen peroxide is reduced
B. hydrogen peroxide is oxidized, melanin is reduced
C. hydrogen peroxide and melanin are oxidized
D. hydrogen peroxide and melanin are reduced

What advantage does hydrogen peroxide have over other bleaching agents such as chlorine gas? Hydrogen peroxide decomposes into nontoxic water and oxygen.

Question 4

How does hydrogen peroxide play a role in air pollution?Peroxide fragments react with unburned fuel creating eye irritants.

Question 5

In the reaction between melanin and hydrogen peroxide, which substance is oxidized (receives electrons)? melanin is oxidized,hydrogen peroxide is reduced

aliasger2709 aliasger2709 · Answer 2 · 2022-02-25T06:17:48+01:00

Hydrogen peroxide bleaches hair by breaking the bond, it gets decomposed into non-toxic water, can be an eye irritant and gets reduced in the reaction with melanin.

What is hydrogen peroxide and its role?

Hydrogen peroxide is a chemical reagent that can be used as an antiseptic, bleaching agent and as an oxidiser. It is used as a bleaching agent as it splits the double bond present in the coloured molecules. Hence, option A is correct.

It is more advantageous over other bleaching agents as it gets decomposed into non-toxic products like oxygen and water making them better over chlorine gas. Hence, option A is correct.

It can be an air pollutant as the fragments of the peroxide molecule can react with the unburned fossil fuels present in the environment and act as an eye irritant. Hence, option A is correct

When hydrogen peroxide is reacted with melanin then hydrogen peroxide gives the electron and gets reduced and melanin gets oxidized. Hence, option A is correct.

Therefore, hydrogen peroxide is an antiseptic that can be also used as a bleaching agent.

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