Question

Which of the following compounds will be dissociated into its constituent ions?

• A. Solid $NaCl$
• B. Molten $NaCl$
• C. Solid $CaC{l}_2$
• D. Molten $CaC{l}_2$

Answer 1

Answer: (B), (D)

The correct options are
B Molten $NaCl$
D Molten $CaC{l}_2$

When electric current is passed through an electrolyte in its molten or aqueous state, the electrolyte is dissociated into its constituent ions.
Molten $NaCl$ breaks down to form $N{a}^{+}$ and $C{l}^{-}$ where Sodium transfers its valence electron to Chlorine. So Sodium gets one positive charge and Chlorine gets one negative charge.
Molten $CaC{l}_2$ breaks down to form $C{a}^{2+}$ and two $C{l}^{-}$ ion where Calcium transfers its two valence electron to Chlorine. Hence Calcium gets two positive charges and each Chlorine atom gets one negative charge.