Question

Bathroom fitting is plated with ____________ to prevent rusting.
A) Zinc
B) Copper
C) Sulphate
D)Chromium

Answer 1

Hint:At first we will write what bathroom fittings include then we will know why there is the need of plating on those fittings. Then we will know what will be the type of plating done on them. In the end we will know the metal which is used in plating. We will look at the effect of plating. Then we will choose the correct option.


Complete step by step solution:
Step1. Bathroom fittings include tap, showers and other pipes. They are made up of metal which basically uses iron and steel. Now they are electroplated with another metal.
Step2. There is dire need of electroplating because of corrosion. The water flows into the bathroom fittings. Now the metal will use the water and oxygen then it will be converted into its hydroxide or oxide form. A layer will be deposited over metal which will slowly destroy it
Step3. To prevent corrosion we use the electroplating method. Bathroom fittings are electroplated with the chromium. It is deposited by using the chromic acid and water. There is often one or more than one acid used to work as the catalyst and to help the chromium in the cathodic deposition. Sulphates and fluorides are most commonly used.
Step4. Now platting will stop the corrosion and degradation of the metal.

Hence the option D is the correct answer.


Note:Electroplating is the process of applying a coating of one metal to another. A Dc current is passed through the solution, it affects the transfer of metal ions onto the cathodic surface, plating the metal onto the item.