Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETChemistryElectrochemistry

What is the purpose of covering the surface of a metallic object with paint or chemicals, as mentioned in the paragraph?

Options

  1. ATo increase the weight of the object.
  2. BTo enhance the electrical conductivity of the object.
  3. CTo prevent contact with the atmosphere and, hence, corrosion.
  4. DTo give the object a shiny appearance.

Correct answer

C. To prevent contact with the atmosphere and, hence, corrosion.

Step-by-step solution

One of the simplest methods of preventing corrosion is to prevent the surface of the metallic object to come in contact with the atmosphere. This can be done by covering the surface with paint or by some chemicals (e.g. bisphenol).

Practice Electrochemistry on Quantrex Academy →

More from Electrochemistry

Calculate the conductivity of 0.025 M BaCl ₂ solution if the molar conductivity of salt at 25^ C is 325 ⁻¹ cm ^2 mol ⁻¹ . 2026Calculate the equilibrium constant at 25 ^ C for the cell reaction, Ni(s) + Cu ²⁺(1 M ) Ni ²⁺(1 M ) + Cu(s) if E^ _ cell is 0.592 V . 2026Calculate the time required in second to deposit 5.85 g Ni from NiCl ₂ solution by passing 10 A current (molar mass of Ni = 58.5 g mol ⁻¹ ) 2026Which of the following cell reactions is exhibited by fuel cell? 2026Which of the following types of cells is used for electroplating? 2026Which of the following acts as a cathode in a dry cell? 2026What is the Standard cell potential of a cell constituted by two electrodes, A (E^0_ A ^+/ A = 0.30 V ) and B (E^0_ B ^+/ B = +0.42 V ) ? 2026How long (in minutes) must a 2 A current be passed through AgNO ₃ solution to deposit 5.4 g Ag ? [Molar mass of Ag = 108 g mol ⁻¹ ] 2026 Full Electrochemistry list All NEET PYQs