The cell reaction for the given cell is spontaneous if:
Ptcl2|cl-(1M)||Cl-(1M)|PtCl2
1. P1 > P2
2. P1 < P2
3. P1 = P2
4. P1 = 1 atm
Each of the three metals X, Y and Z were put in turn into aqueous solution of the other two.
Which observation is probably incorrect?
1. Y + Salt of X = No action observed
2. Y + Salt of Z = Z + Salt of Y
3. Z + Salt of X = X + Salt of Z
4. Z + Salt of Y = No action observed
The standard reduction potentials of Cu2+/Cu and Cu2+/Cu+ are 0.337 and 0.153V respectively. The standard electrode potential of Cu+/Cu half cell is:
1. 0.184V
2. 0.827V
3. 0.521V
4. 0.490V
When a lead storage battery is discharged, then:
1. SO2 is evolved.
2. Lead is formed.
3. Lead sulphate is consumed.
4. Sulphuric acid is consumed.
The molar conductances of Ba2+ and Cl- 127 and 76Ω-1 cm-1 mol-1 respectively at infinite dilution. The equivalent conductance of BaCl2 at infinite dilution will be
1. 139.52
2. 203
3. 279
4. 101.5
A depolariser used in dry cell batteries is:
1. Ammonium chloride
2. Manganese dioxide
3. Potassium hydroxide
4. Sodium phosphate
The reaction taking place at anode when an aqueous solution of CuSO4 is electrolysed using inert Pt electrode:
1. 2 S2 + 2e
2. Cu2+ + 2e Cu
3. 2H2O O2 + 4H+ + 4e
4. 2H+ +2e H2
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to
1. increase in ionic mobility of ions
2. 100% ionisation of electrolyte at normal dilution
3. increase in both, i.e. number of ions and ionic mobility of ions
4. increase in number of ions
A hydrogen gas electrode is made by dipping platinum wire in a solution of HCI of pH = 10 and by passing hydrogen gas around the platinum wire at 1 atm pressure. The oxidation potential of the electrode would be:
1. 0.059 V
2. 0.59 V
3. 00.118 V
4. 1.18 V
4.5 g of aluminium (atomic mass 27u) is deposited at cathode from Al3+ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H+ ions in solution by the same quantity of electric charge will be
1. 44.8 L
2. 22.4 L
3. 11.2 L
4. 5.6 L