Consider the following hydroxides:

Question

Consider the following hydroxides: Be(OH)₂ Sr(OH)₂ Mg(OH)₂ Ba(OH)₂ The correct order of basicity of the above hydroxides will be:

Vimal Swarnkar · Accepted Answer

(d) Be(OH)₂ < Mg(OH)₂ < Sr(OH)₂ < Ba(OH)₂. Down group 2, ionisation energy falls and M–OH bond becomes more ionic → basicity rises: Be(OH)₂ (amphoteric) < Mg(OH)₂ < Sr(OH)₂ < Ba(OH)₂ → (d). Solubility also rises down the group.

Answer

(a) Sr(OH)₂ < Be(OH)₂ < Ba(OH)₂ < Mg(OH)₂

Answer

(b) Be(OH)₂ < Mg(OH)₂ < Ba(OH)₂ < Sr(OH)₂

Answer

(c) Mg(OH)₂ < Ba(OH)₂ < Sr(OH)₂ < Be(OH)₂

Geo-Scientist Prelims 2020 Chemistry Q31: Consider the following hydroxides:

Questions-block / hydroxides