The correct order of decomposition temperature of $\mathrm{MgCO}_3$ $(\mathrm{X}) .…

The correct order of decomposition temperature of $\mathrm{MgCO}_3$ $(\mathrm{X}) . \mathrm{BaCO}_3(\mathrm{Y}), \mathrm{CaCO}_3(\mathrm{Z})$ is
  1. $\mathrm{Y} \gt \mathrm{Z} \gt \mathrm{X}$
  2. $X \gt Y \gt Z$
  3. $Y \gt X \gt Z$
  4. $X \gt Z \gt Y$

Solution

Thermal stability increases with increasing cationic size. So, correct order is $\mathrm{BaCO}_3 \gt \mathrm{CaCO}_3 \gt \mathrm{MgCO}_3$

Asked in: AP EAMCET 2024 (19 May Shift 2)

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