Question

Assertion (A): Oxidising bleaches, like hydrogen peroxide, work by releasing oxygen, which breaks down colour molecules in stains.

Reason (R): The oxygen released by oxidising bleaches oxidises the colour molecules, making them colourless and soluble, thus aiding in stain removal.

विकल्प

• A is true, but R is false.

• A is false, but R is true.

• Both A and R are true, and R is the correct explanation of A.

• Both A and R are true, and R is not the correct explanation of A.

Answer 1

Both A and R are true, and R is the correct explanation of A.

Explanation:

The assertion is true because oxidising bleaches, such as hydrogen peroxide, eliminate fabric stains by chemically breaking down their chromophores (the colour-producing parts of stain molecules). The reason perfectly explains this process because the nascent oxygen released during the reaction attaches to these chromophores, altering their structure to render them completely colourless and highly water-soluble, which allows them to wash away easily.