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
D.
produce high purity water
Any cell (such as fuel cell), works when a potential difference is developed.