Chemistry (M.Phil./Ph.D.) 2021 Panjab University Entrance Exam With Answers

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34.

Consider the following compounds—

(1) K2CO3 (2) MgCO3 (3) CaCO3 (4) BeCO3
Which one of the following arrangements in the increasing order of their thermal stabilities is correct?
A: 1 < 2 < 3 < 4
B: 2 < 4 < 3 < 1
C: 3 < 2 < 1 < 4
D: 4 < 2 < 3 < 1

The answer is: D

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