JEE PYQ: S Block Elements Question 28
Question 28 - 2019 (12 Apr Shift 1)
The correct sequence of thermal stability of the following carbonates is:
(a) $\text{BaCO}_3 < \text{CaCO}_3 < \text{SrCO}_3 < \text{MgCO}_3$ (b) $\text{MgCO}_3 < \text{CaCO}_3 < \text{SrCO}_3 < \text{BaCO}_3$ (c) $\text{MgCO}_3 < \text{SrCO}_3 < \text{CaCO}_3 < \text{BaCO}_3$ (d) $\text{BaCO}_3 < \text{SrCO}_3 < \text{CaCO}_3 < \text{MgCO}_3$
Show Answer
Answer: (b)
Solution
Thermal stability of alkaline earth metal carbonates increases down the group. $\therefore \text{MgCO}_3 < \text{CaCO}_3 < \text{SrCO}_3 < \text{BaCO}_3$.
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