Question

Which of the following is easily formed?

• A. Magnesium Chloride
• B. Calcium fluoride
• C. Potassium bromide
• D. Magnesium bromide

Answer 1

The correct option is C Potassium bromide

Potassium bromide is easily formed.
Among the ions $K^{+},M{g}^{2+}C{a}^{2+}$, the ionization energy is minimum for $K^{+}$ ion.
Also, among fluorine, chlorine and bromine, the magnitude of the electron gain enthalpy for bromine is minimum.