Given the data at 25oC,
Ag + I- → Agl +e-; Eo = 0.152 V
Ag → Ag+ + e- ;Eo = -0.800 V
What is the value of log Ksp for Agl?
(2.303RT/F = 0.059 V)
–8.12
+8.612
–37.83
–37.83
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 Sm–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
124 × 10–4 Sm2 mol–1
1240 × 10–4 Sm2 mol–1
1.24 × 10–4 Sm2 mol–1
1.24 × 10–4 Sm2 mol–1
The ionic mobility of alkali metal ions in aqueous solution is maximum for
K+
Rb+
Li+
Li+
If α is the degree of dissociation of Na2SO4, the vant Hoff’s factor (i) used for calculating the molecular mass is
1 + α
1 - α
1 +2α
1 +2α
The highest electrical conductivity of the following aqueous solutions is of
0.1 M acetic acid
0.1 M chloroacetic acid
0.1 M fluoroacetic acid
0.1 M fluoroacetic acid
Aluminium oxide may be electrolysed at 1000o C to furnish aluminium metal (Atomic mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is
Al3+ +3e- → Alo
To prepare 5.12 kg of aluminium metal by this method would require
5.49 x 107 C of electricity
1.83 x 107 C of electricity
1.49x 107 C of electricity
1.49x 107 C of electricity
Electrolyte | KCl | KNO3 | HCl | NaOAc | NaCl |
∧∞S cm2 mol- | 149.9 | 145.0 | 426.2 | 91.0 | 126.5 |
517.2
552.7
390.7
390.7
Calomel (Hg2Cl2) on reaction with ammonium hydroxide gives
HgNH2Cl
NH2 – Hg – Hg – Cl
Hg2O
Hg2O
Which among the following factors is the most important in making fluorine the strongest oxidizing halogen?
Electron affinity
Bond dissociation energy
Hydration enthalpy
Hydration enthalpy
In hydrogen-oxygen fuel cell, combustion of hydrogen occurs to
generate heat
remove adsorbed oxygen from electrode surfaces
produce high purity water
produce high purity water