Which one of the following order of the carbonates is Correct for their decomposition temperature? · ABC26IN0709
Subject: Inorganic Chemistry · Chapter: Main Group Elements · Topic: Main Group Elements – General · Exam: JAM 2005-2022 · Marks: 2 · Difficulty: Hard
Which one of the following order of the carbonates is Correct for their decomposition temperature?
(a)$\mathrm{BaCO}_{3}>\mathrm{CaCO}_{3}>\mathrm{SrCO}_{3}>\mathrm{MgCO}_{3}$
(b)$\mathrm{BaCO}_{3}>\mathrm{SrCO}_{3}>\mathrm{CaCO}_{3}>\mathrm{MgCO}_{3}$
(c)$\mathrm{MgCO}_{3}>\mathrm{CaCO}_{3}>\mathrm{SrCO}_{3}>\mathrm{BaCO}_{3}$
(d)$\mathrm{MgCO}_{3}>\mathrm{CaCO}_{3}>\mathrm{BaCO}_{3}>\mathrm{SrCO}_{3}$
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
Thermal stability of carbonates rises with cation size: BaCO₃ > SrCO₃ > CaCO₃ > MgCO₃ (b).
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