Chemistry
Define :
(i) Electrolysis
(ii) Electrodes
(iii) Ions
(iv) Electrolytic dissociation.
Answer
(i) Electrolysis — It is the decomposition of a chemical compound [electrolyte] in the aqueous or fused [molten] state by the passage of direct electric current resulting in discharge of ions as neutral atoms at the respective electrodes.
(ii) Electrodes — They allow the electric current to enter or leave the electrolytic solution. The electrodes are two in number and are made of metal or carbon.
(iii) Ions — They are atoms which carry a positive or negative charge and become free and mobile when an electric current is passed through an aqueous solution of a chemical compound.
(iv) Electrolytic dissociation — The process due to which an ionic compound in the fused [molten] or in aqueous solution state dissociates into ions by passage of electric current through it is called electrolytic dissociation.
Related Questions
Differentiate between
(i) Electrolytes and Non-electrolytes
(ii) Strong and Weak electrolytes
(iii) Anode and Cathode
(iv) Electrolytic dissociation and ionization with suitable examples.
State which of the following solutions are weak electrolytes — dil. HCI; carbonic acid; NH4OH; dil. H2SO4; AgNO3; Na2CO3; PbBr2; KOH; HI; oxalic acid, NaHCO3; sodium acetate; Na2SO4; NaOH.
Name three organic compounds and one neutral liquid which are non-electrolytes.
Compare the flow of electricity through a nickel wire and nickel sulphate solution.