Which mineral is directly used in manufacturing bleaching powder, insecticides and paints?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Mangenese
The mineral directly used in manufacturing bleaching powder, insecticides, and paints is Manganese.
While Manganese is primarily known as a crucial ingredient in the iron and steel industry (nearly 10 kg is required to manufacture one tonne of steel), it has significant chemical applications as well.
Key Uses of Manganese:
- Bleaching Powder: Manganese dioxide ($MnO_2$) was historically used in the production of chlorine, which is a key component of bleaching powder.
- Insecticides: Manganese compounds are used as active ingredients or catalysts in the formulation of various pesticides and fungicides (like Maneb).
- Paints: It is used as a black-brown pigment and as a "drier" to help oil-based paints and varnishes dry more quickly.
- Batteries: It is a vital component in dry-cell batteries (Leclanché cells).