The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct order.K₂CO₃(I), MgCO₃(II), CaCO₃ (III), BeCO₃ (IV)

I < II < III < IV

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IV < II < III < I

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IV < II < I < III

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II < IV < III < I

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Solution

The correct option is B
IV < II < III < I

Alkali carbonates are stable to heat and in alkaline earth stability increases down the group

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