Electrolysis and metallurgy

Out of the following ions which would get discharged first at the cathode

• So4

• Cu

• Ag

• OH

The colour of the aqueous solution of copper sulphate ________ when inert electrodes are used

• Remians same

• Fades away

• Turns pinkish red

• None of the following

The temperature of lead bromide needed for electrolysis is ___

• 390⁰c

• 420⁰c

• 380⁰c

• 480⁰c

The electrode of which material is required for electrolysis of acidified water

• Copper

• Carbon

• Platinum

• Nickle

Out of the following ions

OH- , SO4 , H+ , CU+

The product formed at anode is

• Oxygen

• Hrdroxyl molecule

• Hydrogen gas

• Copper metal

The current used in electroplating is

• Dc

• Ac

• Mc st

• None of the following

The electrolyte used during electroplating of silver

• Sodium argento cyanide

• Aqueous Sodium silverto

• Sodium silver cyanide

• NaAlO3

The dirt left behind while electrorefining is called

• Metal impurity

• Anode dust

• Anode mud

• Ore dirt

During electrolysis of Aqueous copper sulphate with active electrode the anode

• Increases in size

• Decreases in size

• Remains the same size

• None of the above

Dil. HCL is which type of electrolyte

Strong or weak