NEET

To deposit 0.634 g of copper by electrolysis of aqueous cupric sulphate solution, the amount of electricity required(in coulombs) is

1930
3960
4825
9650

Solution

Without losing its concentration ZnCl₂ solution cannot be kept in contact with

Solution

Without losing its concentration ZnCl₂ solution cannot kept in contact with Al because Al is more reactive than Zn due to its highly negative electrode reduction potential.

Solution

At 298K the standard free energy of formation of H₂O (ℓ) is –237.20 kJ/mole while that of its ionisation into H⁺ ion and hydroxyl ions is 80 kJ/mole, then the emf of the following cell at 298 K will be[Take Faraday constant F = 96500 C] H₂ (g , 1 bar) | H⁺(1 M) | | OH^–(1 M) | O₂(g, 1 bar)

0.40 V
0.81 V
1.23 V
– 0.40 V

Solution

Solution

Reduction occurs at cathode. Among the given choices,the reaction shown in option (b)is the reduction of Ag⁺ to Ag. So, it occurs at cathode.

Which of the following statements about galvanic cell is incorrect

anode is positive
oxidation occurs at the electrode with lower reduction potential
cathode is positive
reduction occurs at cathode

Solution

Anode has negative polarity.

Specific conductance of 0.1 M HNO₃ is 6.3×10^-2. The molar conductance of the solution is

100 ohm^-1 cm²
515 ohm^-1 cm²
630 ohm^-1 cm²
6300 ohm^-1 cm²

Solution

The resistance of 1 N solution of acetic acid is 250 ohm,when measured in a cell of cell constant 1.15 cm^-1. The equivalent conductance (in ohm^-1 cm² equiv^-1) of 1 N acetic acid will be

4.6
9.2
18.4
0.023

Solution

Solution

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0

Wrong

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Complete

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UnAttempted

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