Chemistry in Everyday Life

Here's a breakdown of the matching and why the correct answer is Option C:

Let's analyze each compound and its corresponding use:

(A) Sodium perborate is a common ingredient in laundry detergents and is known for its bleaching and stain-removing properties. Therefore, it's linked to (R) Milk bleaching agent.

(B) Chlorine is a powerful disinfectant and is widely used in water treatment, sanitation, and cleaning. It's a strong disinfectant, so it matches (1) Disinfectant.

(C) Bithional is an antiseptic agent commonly found in soaps and personal care products. It helps prevent the growth of bacteria and fungi. Therefore, it matches (2) Antiseptic.

(D) Potassium stearate is a major component of soap. It acts as a surfactant, helping to remove dirt and grease through emulsification. This matches (4) Soap.

Therefore, the correct matching is:

A - 3, B - 1, C - 2, D - 4

This corresponds to Option C.

Sodium or ammonium thiosulphate is used as a fixing agent in photography. They converts the silver halide into soluble, complex silver salts that dissolve in the fixer. During this process the film loses its original silver halide milkiness overlaying the image and becomes clear.

Sodium stearate (C₁₇H₃₅COO^$-$Na⁺) is an anionic soap. Anionic part of sodium stearate is involved in cleansing action.

BHA is antioxidant (i.e. prevent oxidation). It help in food preservation by retarding the action of oxygen on food. As it is more reactive towards oxygen than the food material.

The structure of an important antipyretic paracetamol is

So p-amino phenol gives paracetamol an acetylation.