Q. Property of the alkaline earth metals that increases with their atomic number
A) Electronegativity
B) Solubility of their hydroxides in water
C) Solubility of their sulphates in water
D) Ionization energy
Explanation
[Solution from source] Down group 2 the lattice enthalpy of hydroxides falls faster than hydration enthalpy, so hydroxide solubility increases (Be(OH)₂ is insoluble, Ba(OH)₂ is fairly soluble). Sulphate solubility does the opposite and decreases; electronegativity and ionisation energy also decrease. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.