Correct Option
The correct matching is A-2, B-4, C-1, D-3.
- Potassium bromide (A) is used in photography (2). It functions as a restrainer in photographic emulsions, particularly in black-and-white film development, to control sensitivity and improve image quality.
- Potassium nitrate (B) is a primary component of gunpowder (4). It acts as an oxidizing agent, facilitating the rapid combustion of other ingredients in black powder.
- Potassium sulphate (C) is widely employed as a fertiliser (1). It supplies both potassium and sulfur, which are essential macronutrients for optimal plant growth and development.
- Monopotassium tartrate (D), commonly known as cream of tartar, is utilized in bakery products (3). It serves as a leavening agent, often combined with baking soda to produce carbon dioxide, which aids in the rising of dough.
Incorrect Options
- Option (B) 2314 is incorrect. It misidentifies Potassium nitrate with Bakery (correctly Gun powder) and Monopotassium tartrate with Gun powder (correctly Bakery).
- Option (C) 4231 is incorrect. It contains multiple mismatches, including Potassium bromide with Gun powder (correctly Photography), Potassium nitrate with Photography (correctly Gun powder), Potassium sulphate with Bakery (correctly Fertiliser), and Monopotassium tartrate with Fertiliser (correctly Bakery).
- Option (D) 4213 is incorrect. It incorrectly pairs Potassium bromide with Gun powder (correctly Photography) and Potassium nitrate with Photography (correctly Gun powder).