Current Electri...

Two electrolytic cells containing CuSO₄ do AgNO₃ respectively are connected in series and a current is passed through them until 1mg of copper is deposited in the first cell. The amount of silver deposited in the second cell during this time is approximately
[Atomic weights of copper and silver are respectively 63.57 and 107.88]

A current I is passed for a time t through a number of voltameters. If m is the mass of a substance deposited on an electrode and z is its electrochemical equivalent, then

For electroplating a spoon, it is placed in the vlotameter at

If nearly 10⁵ coulomb liberate 1 gm equivalent of aluminium, then the amount of aluminium (equivalent weight 9) deposited through electrolysis in 20 minutes by a current of 50 amp will be

Electroplating does not help in

When a current is passed through water, acidified with a dilute sulphuric acid, the gases formed at the platinum electrodes are

The negative Zn pole of a Daniel cell, sending a constant current through a circuit, decreases in mass by 0.13 g in 30 minutes. If the electrochemical equivalent of Zn and Cu are 32.5 and 31.5 respectively, the increase in the mass of the positive Cu pole in this time is

A copper voltameter is connected in series with a heater coil of resistance 0.1 S2. A steady current flows in the circuit for twenty minutes and mass of 0.99g of copper is deposited at the cathode. If electrochemical equivalent of copper is 0.00033 gm/C, then heat generated in the coil is

The value of current required to deposit 0.972 gm of chromium in 3 hours if the E.C.E. of chromium is 0.00018 gm per coulomb, is

The current inside a copper voltameter