1. Tardigrade
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  4. Among the following the least thermally stable is

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Q. Among the following the least thermally stable is

J & K CETJ & K CET 2009The s-Block Elements

Solution:

Thermal stability of carbonates increases on moving down a group. Thus, lithium carbonate,
$ Li_2CO_3 $ is least thermally stable.
$ Li_{2}CO_{3}\xrightarrow{\Delta }Li_{2}O+CO_{2}\uparrow $