JEE Main 2015 · 10 Apr · Shift 1 · Chemistry Q44

ChemistrySingle correct+4 / -1Question 44 of 90

The correct order of thermal stability of hydroxides is :

\ce{Ba(OH)2 < Sr(OH)2 < Ca(OH)2 < Mg(OH)2}

\ce{Ba(OH)2 < Ca(OH)2 < Sr(OH)2 < Mg(OH)2}

\ce{Mg(OH)2 < Ca(OH)2 < Sr(OH)2 < Ba(OH)2}

\ce{Mg(OH)2 < Sr(OH)2 < Ca(OH)2 < Ba(OH)2}

Answer and worked solution

Official answer: C

Thermal stability rises down the group as the cation gets larger and less polarising: $\ce{Mg(OH)2 < Ca(OH)2 < Sr(OH)2 < Ba(OH)2}$ .

JEE Main 2015 · 10 Apr · Shift 1, Chemistry question 44