Which of the following is the process by which particles made of base metals are coated with a thin layer of copper, silver, gold, etc by electrolysis ?
Electrolysis
Galvanization.
Electroplating.
Diffusion
When the ends of metal wire are not connected to a battery:
electrons move from positive electrode to negative electrode
electrons move from negative electrode to positive electrode
electrons move in random directions
protons move in random direction in such a way that their net movement in a unit volume is zero
Copper electrode
Donates electrons to hydrogen ions
Accepts electrons from hydrogen ions
Donate electrons to sulphate ions
Accepts electrons from sulphate ions
The electrode at which terminal get plated during electroplating?
Positive.
Negative.
Neutral.
Either positive or negative
The passage of electric current through solution causes
Physical effect.
Chemical effect.
Neutral effect.
None of these.
................ present in the lemon juice acts as a electrolyte.
Nitric acid
Sulphuric acid
Citric acid
Hydrochloric acid
When an electron moves from negative electrode to positive electrode:
Negative charge moves from negative electrode to positive electrode.
Positive charge moves from positive electrode to negative electrode .
No charge flows from either electrode to other electrode.
Both A and B.
Switch is used to
Open an electric circuit
Increase electric voltage in a circuit
Decrease the voltage in the circuit
Open and close an electric circuit
Rate of flow of charge is called
Voltage
Resistance
Current
Conductance
A cell converts:
Electrical energy into chemical energy.
Chemical energy into electrical energy.
Magnetic energy into electrical energy.
Electrical energy into mechanical energy.
