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Name an alkali metal carbonate which is ...

Name an alkali metal carbonate which is thermally ustable and why? Give its decompostion reaction.

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`Li_(2)CO_(3)` is thermally unstable because it is covalent. It decomposes to form `Li_(2) O` and `CO_(2)`
`Li_(2) CO_(3) to Li_(2) O + CO_(2)`
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