Question

Define electrolysis ?

Answer 1

Answer:

Answer :-

It is a process in which ionic substances ( they are charged particle) are decomposed into the simpler substances when an electric current is pass through it.

Example :- Sodium (Na), magnesium (Mg) and calcium (Ca) are obtain by electrolysis of their molten chlorides. The metals are deposited at the cathode ( they are negatively charged ion ) whereas chlorine is liberated at the anode ( they are positively charged ion ).

At cathode :- Na^+ + e^- --> Na

At anode :- 2Cl^- --> Cl2 + 2e^-

Answer 2

$\underline \mathbb{ELECTROLYSIS}$

»These reaction involve the use of electrical energy for the decomposition of the reactant molecules.

$\underline \mathbb{EXAMPLE}$

• When electric current is passed through water it decomposes to give Oxygen and hydrogen.

2H2O --------› 2H2. + O2

Water. Hydrogen. Oxygen

• When electric current is passed through molten sodium chloride, it decomposes to give sodium metal and chlorine gas.

2NaCl ---------› 2Na. + Cl2

Molten. Sodium. Chlorine

sodium

Chloride

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