Which among the following metals is employed to provide cathodic protection to iron?

• Zinc

• Nickel

• Tin

• Lead

Galvanization is applying a coating of:

• Cr

• Cu

• Zn

• Zn

Two Faraday of electricity is passed through a solution of CuSO₄. The mass of copper deposited at the cathode is: (at. mass of Cu = 63.5 amu)

• 0 g

• 63.5 g

• 2 g

• 2 g

The equivalent conductance of NaCl at concentration C at infinite dilution are λ_C and λ_∞ respectively. The correct relationship between λ_C and λ_∞  is given as (where the constant B is positive)

• λ_C = λ_∞ +(B)C

• λ_C = λ_∞ -(B)C

• λ_C = λ_∞ -(B)

• λ_C = λ_∞ -(B)

Given below are the half-cell reactions
Mn²⁺ + 2e^- → Mn; E^o = - 1.18 eV
2(Mn³⁺ + e^- →Mn²⁺); E^o = +1.51 eV
The E^o for 3Mn²⁺ → Mn + 2Mn³⁺ will be

• -2.69 V; the reaction will not occur

• -2.69 V; the reaction will occure

• -0.33 V; the reaction will not occur

• -0.33 V; the reaction will not occur

6.

Given, 


Based on the data given above, strongest oxidising agent will be

• Cl

• Cr³⁺

• Mn²⁺

• Mn²⁺

Four successive members of the first-row transition elements are listed below with atomic numbers. Which one of them is expected to have the highest   value?

• Cr (Z =24)

• Mn(Z =25)

• Fe (Z = 26)

• Fe (Z = 26)

How many litres of water must be added to 1 L to an aqueous solution of HCl with a pH of 1 create an aqueous solution with PH of 2?

• 0.1 L

• 0.9 L 

• 2.0 L 

• 2.0 L 

The reduction potential of hydrogen half-cell will be negative if 

• p(H₂) = 1 atm and [H⁺] = 2.0 M

• p(H₂) = 1 atm and [H⁺] = 1.0 M

• p(H₂) = 2 atm and [H⁺] = 1.0 M

• p(H₂) = 2 atm and [H⁺] = 1.0 M

The degree of dissociation (α) of a weak electrolyte ,A_xB_y is related to van't Hoff factor (i) by the expression