The oxidation state of chromium in the final product formed by the reaction between Kl and acidified potassium dichromate solution is

Resistance of 0.2 M solution of an electrolyte is 50 Ω. The specific conductance of the solution is 1.3 S m^–1. If resistance of the 0.4 M solution of the same electrolyte is 260 Ω, its molar conductivity is

E₁, E₂ and E₃ are the emf values of the three galvanic cells respectively.

(a) Zn | Zn+2
1 M || Cu+2
0.1 M | Cu

(b) Zn | Zn+2
1 M || Cu+2
1 M | Cu

(c) Zn | Zn+2
0.1 M || Cu+2
1 M | Cu

Which one of the following is true?

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

The equivalent conductance of M/32 solution of a weak monobasic acid is 8.0 mhos cm² and at infinite dilution is 400 mhos cm². The dissociation constant of this acid is

The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the reaction of the cell is

9.65 C of electric current is passed through fused anhydrous magnesium chloride. The magnesium metal thus, obtained is completely converted into a Grignard reagent. The number of moles of the Grignard reagent obtained is ______.

An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to

The Gibbs energy for the decomposition of Al₂O₃ at 500°C is as follows:

$\dfrac{2}{3}$Al₂O₃ → $\dfrac{4}{3}$Al + O₂, Δ_rG = +966 kJ mol^–1

The potential difference needed for electrolytic reduction of Al₂O₃ at 500°C is at least

Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1 M is 100 Ω. The conductivity of this solution is 1.29 S m^–1. Resistance of the same cell when filled with 0.2 M of the same solution is 520 Ω. The molar conductivity of 0.02 M solution of the electrolyte will be