What is the chemical formula of bleaching powder?

Ca(OCl)₂

The correct answer is option 3. \(Ca(OCl)_2\).

Bleaching powder, also known as calcium hypochlorite, has the chemical formula \(Ca(OCl)_2\). It is a compound composed of calcium ions \((Ca^{2+})\) and hypochlorite ions \((OCl^-)\).

The hypochlorite ions are the active ingredient in bleaching powder, responsible for its bleaching and disinfecting properties. When dissolved in water, bleaching powder releases hypochlorite ions, which act as strong oxidizing agents. These ions are effective at breaking down and removing stains, as well as killing bacteria, viruses, and other microorganisms.

Bleaching powder is commonly used as a disinfectant for water treatment, swimming pools, and sanitation purposes. It is also used as a bleaching agent in the textile and paper industries, as well as for whitening purposes in household cleaning products.

Overall, the chemical formula \(Ca(OCl)_2\) represents the composition of bleaching powder, which contains calcium and hypochlorite ions and is widely used for its bleaching and disinfecting properties.