Q14 / 160 · AP EAMCET 2024 (19 May Shift 2) · Chemistry

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

  • Correct answer
    A
    $\mathrm{Y} \gt \mathrm{Z} \gt \mathrm{X}$
  • B
    $X \gt Y \gt Z$
  • C
    $Y \gt X \gt Z$
  • D
    $X \gt Z \gt Y$

Solution

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

Hence, the correct answer is option: 'A'.

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