Question

66. In electrolysis of pure ionic molten compunds.
metal is formed at
(A) anode
(B) base of apparatus
(C) inert electrode
(D) cathode
​

Answer 1

d) at cathode is right answer.

Answer 2

Answer:

In electrolysis of pure ionic molten compounds, metal is formed at cathode.

Therefore, the option (D) is correct.

Explanation:

• Electrolytic cell is used to convert the electrical energy into chemical energy by a process called electrolysis. When water undergoes electrolysis, it brakes into ions. Here, the additional energy required to overcome the threshold barrier.
• Electrolytic cells consists two electrodes. These electrodes are held in the contact with ionic compound. These two electrodes connected with battery. The electrode connected to the negative terminal of the battery is cathode and the electrode connected to the positive terminal of the battery is anode.
• When the molten sodium chloride undergoes the decomposition it gives sodium metal and chlorine gas.
• At cathode (reduction):

        Na⁺  +   e⁻  $\longrightarrow$  Na (s)

• At anode (oxidation) :

       2Cl⁻    $\longrightarrow$   Cl₂ (g)  +   2e⁻  

• The overall reaction of electrolysis of molten sodium chloride is:

        2NaCl     $\longrightarrow$   2Na (s)  +   Cl₂ (g)

Therefore, the solid metal formed at cathode after the reduction in electrolysis.