Sodium Carbonate Solution is a _________ [Strong / Weak / Non] Electrolyte.
Weak
5
Electrolytic cell is also called ________.
voltameter
5
Which is the negative electrode? Which ions migrate to it?
Cathode, Cation
10
State the charge of the electrode where oxidation takes place.
Positive
10
What is meant by the degree of dissociation?
It is the extent to which an electrolyte breaks up into ions
15
Explain how OH- ion yields oxygen gas at the anode.
4 OH- ons lose an electron each and give 2 molecules of water and one molecule of oxygen
15
What is electrolytic dissociation?
The process due to which an ionic compound in the fused state or in aqueous solution state dissociates into ions by passage of electric current through it.
20
State the entire electro-chemical series of metals in proper order.
K, Ca, Na, Mg, Al, Zn, Fe, Pb, [H], Cu, Hg, Ag
20
___________ takes place in covalent compounds. [dissociation / ionization]
Ionisation
5
Metals which ionize most readily are at the ________ of the series. [top / bottom]
top
5
Name the products at cathode and anode during the electrolysis of conc. NaCl solution.
Cathode - Hydrogen gas, Anode - Chlorine gas
10
Why is pure water a non-electrolyte?
Because contains only molecules and not ions to conduct electricity
10
What name is given to electrolysis of water? Why?
Catalysis, because dil. sulphuric acid acts as a catalyst in the process.
15
What is selective discharge of ions? Name one factor affecting it.
The preferential discharge of ions present in an electrolyte at the respective electrodes is known as selective discharge of ions. Position, Conc, Electrodes
15
Mention any two conditions for electroplating [with reasons]
To be discussed
20
Name the electrolyte used in electroplating of silver. Why it is used? How is it prepared?
