Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main202427 Jan 2024Evening ShiftChemistryElectrochemistryActual

Which of the following statements is not correct about rusting of iron?

Options

  1. ACoating of iron surface by tin prevents rusting, even if the tin coating is peeling off.
  2. BWhen pH lies above 9 or 10 , rusting of iron does not take place.
  3. CDissolved acidic oxides SO 2 , NO 2 in water act as catalyst in the process of rusting.
  4. DRusting of iron is envisaged as setting up of electrochemical cell on the surface of iron object.

Correct answer

A. Coating of iron surface by tin prevents rusting, even if the tin coating is peeling off.

Step-by-step solution

Rusting refers to the creation of rust on the surface of iron objects or structures, which is a mixture of iron oxides. In a water-rich environment, rust is created through a redox interaction between oxygen and iron (or high levels of moisture). The creation of a layer of a red, flaky substance that quickly crumbles into a powder characterises the rusting of iron. As the tin coating is peeled off, then iron is exposed to the atmosphere. Because rusting occurs as a result of a chemical interaction between iron and

Practice Electrochemistry on Quantrex Academy →

More from Electrochemistry

At 300 K, the molar conductivities of the aqueous solutions of three salts at two different concentrations are given below: Salt Concentration (M) Molar conductivity (S cm ^2 mol ⁻ 2026Given at 298 K: E^ _ Fe²⁺/Fe = X Volt; E^ _ Fe³⁺/Fe = Y Volt. The E^ _ Fe³⁺/Fe²⁺ in Volt at 298 K is given by: 2026For a general redox reaction Anode : Red ₁ Ox ₁^ n₁^+ + n₁ e^- Cathode : Ox ₂ + n₂ e^- Red ₂^ n₂^- Which of the following statements is incorrect? 2026Consider the following data. Electrolyte ^ _m (S cm ^2 mol ⁻¹ ) BaCl ₂ x₁ H ₂ SO ₄ x₂ HCl x₃ BaSO ₄ is sparingly soluble in water. If the conductivity of the saturated BaSO ₄ solut 2026One half cell in a voltaic cell is constructed by dipping silver rod in AgNO₃ solution of unknown concentration, other half cell is Zn rod dipped in 1 molar solution of ZnSO₄ . A v 2026At 298 K , the molar conductivity of x % (w/w) MX solution (aqueous) is 123.5 S cm ^2 mol ⁻¹ . The conductance of same solution is 1.9 10⁻³ S . The value of x is _______ 10⁻² . (Gi 2026An electrochemical cell, consist of the following two redox couples, M^ x+ (aq)/M(s)[E_ red ^ =+0.15 V ] and Fe³⁺(aq)/Fe(s)[E_ red ^ =-0.036 V ] . The cell EMF (E_ cell ) is record 2026Consider the following two half-cell reactions along with the standard reduction potential given: CO₂ + 6H^+ + 6e^- CH₃ OH + H₂ O E°_ red = 0.02 V 1 2 O₂ + 2H^+ + 2e^- H₂ O E°_ red 2026 Full Electrochemistry list All JEE Main PYQs