Question
By giving four examples in each case, define or explain the terms (a) strong electrolyte (b) weak electrolyte.

Answer

(a) The electrolytes which are very good conductors of electricity and consist of mostly ions in the fused state or in aqueous state are called strong electrolytes.
Examples : (i) Fused lead bromide (ii) Dilute sulphuric acid
(iii) Aqueous sodium hydroxide (iv) Fused alumina in cryolite.
(b) The electrolytes which are poor conductors of electricity and consist of ions as well as molecules are called weak electrolytes.
Examples : (i) Tap water (ii) Aqueous acetic acid solution (iii) Carbonic acid (iv) Ammonium hydroxide solution.

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