Question

I. The conductivity of molten $NaCl$ is due to movement of $N{a}^{+}$ and $C{l}^{-}$ ions.
II. Solid $NaCl$ is also conductor of electricity
III. Molten sodium is a good conductor because of mobile electrons.

Which of the above statements are correct?

• A. All the statements are correct
• B. II and III are correct
• C. I and III are correct
• D. Only II is correct

Answer 1

The correct option is C I and III are correct

$\to$ Conductiity of electrolyte is related to the movement of ions.

So, conductivity of molten $NaCl$ is due to movement of $N{a}^{+}$ and $C{l}^{-}$ ions.

$\to$ Solid $NaCl$ is not good conductor of electricity as in solid $NaCl$ , ions are strongly bonded by ionic bond and are not free for movement.

$\to$ In molten Sodium Chloride, ions of $NaCl$ are free to move and conduct electric current.