For a cell involving one electron E°cell = 0.59 V at 298 K, the equilibrium constant for the cell reaction is :[ Given that .
1.0 × 105
1.0 × 1010
1.0 × 1030
1.0 × 102
The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is :
20
30
40
10
Which is the correct thermal stability order for H2E (E = O, S, Se, Te and Po)?
H2O < H2S < H2Se < H2Te < H2Po
H2Po < H2Te < H2Se < H2S < H2S
H2Se < H2Te <H2Po < H2O < H2S
H2S < H2O < H2Se < H2Te <H2Po
Identify the incorrect statement related to PCl5 from the following:
Two axial P–Cl bonds make an angle of 180° with each other
Axial P–Cl bonds are longer than equatorial P–Cl bonds
PCl5 molecules in non-reactive
Three equatorial P–Cl bonds make an angle of 120° with each other
The mixture that forms maximum boiling azeotrope is:
Ethanol + Water
Acetone + Carbon disulphide
Heptane + Octane
Water + Nitric acid
For an ideal solution, the correct option is :
Δmix V ≠ 0 at constant T and P
Δmix H = 0 at constant T and P
Δmix G = 0 at constant T and P
Δmix S = 0 at constant T and P
B.
Δmix H = 0 at constant T and P
For ideal solution,
Δmix H = 0
Δmix S > 0
Δmix G < 0
Δmix V = 0
If the rate constant for a first order reaction is k, the time (t) required for the completion of 99% of the reaction is given by:
t = 6.909/k
t = 4.606/k
t = 2.303/k
t = 0.693/k
For the cell reaction
2Fe3+ (aq) +2l-(aq) → 2Fe2+(aq) + I2(aq)
E= 0.24V at 298 K. The standard Gibbs energy (ΔrGΘ) of the cell reaction is:
[Given that Faraday constant F = 96500 C mol–1]
– 23.16 kJ mol–1
46.32 kJ mol-1
23.16 kJ mol-1
- 46.32 kJ mol-1