Chemistry Electrochemistry

At 298 K, the standard electrode potentials of Cu²⁺/Cu, Zn²⁺ /Zn, Fe²⁺ /Fe and Ag⁺ /Ag are 0.34 V, -0.76 V, -0.44 V and 0.80 V, respectively. On the basis of standard electrode potential, predict which of the following reaction can not occur?

Given below are half cell reactions:
MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O, E°(Mn²⁺/MnO₄⁻) = -1.510 V
½O₂ + 2H⁺ + 2e⁻ → H₂O, E°(O₂/H₂O) = +1.223 V

Will the permanganate ion, MnO₄⁻liberate O₂ from water in the presence of an acid?

A 5.0 mmol dm?³ aqueous solution of KCl has a conductance of 0.55 mS when measured in a cell of cell constant 1.3 cm?¹. The molar conductivity of this solution is __________ mSm² mol?¹.

The molar conductivities at infinite dilution of barium chloride, sulphuric acid and hydrochloric acid are 280, 860 and 426 Scm² mol?¹ respectively. The molar conductivity at infinite dilution of barium sulphate is ________ S cm² mol?¹. (Round off to the nearest integer).

The total number of unpaired electrons present in the complex K?[Cr(oxalate)?] is _____.

For the reaction
2Fe³?(aq) + 2I?(aq) → 2Fe²?(aq) + I?(s)
The magnitude of the standard molar free energy change, ?rG° = ____ kJ (Round off to the nearest integer).
[Given: E°(Fe²?/Fe(s)) = -0.440V; E°(Fe³?/Fe(s)) = -0.036V; E°(I?/2I?) = 0.539V; F = 96500C]

A reaction of 0.1 mole of Benzylamine with bromomethane gave 23g of Benzyl trimethyl ammonium bromide. The number of moles of bromomethane consumed in this reaction are n x 10?¹, when n=_____. (Round off to the nearest integer).
[Given: Atomic masses: C=12.0u, H:1.0u, N:14.0u, Br:80.0u]

Kindy consider the following

One of the by-products formed during the recovery of NH₃ from solvay process is:

Match List - I with List - II:
List - I
(a) Ca(OCl)?
(b) CaSO?.½H?O
(c) CaO
(d) CaCO?

List - II
(i) Antacid
(ii) Cement
(iii) Bleach
(iv) Plaster of Paris

Choose the most appropriate answer from the options given below: