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Which of the carbonates given below is unstable in air and is kept in $CO_2$ atmosphere to avoid decomposition.
$(i) BeCO_{3}$
$(ii) MgCO_{3}$
$(iii) CaCO_{3}$
$(iv) BaCO_{3}$

Answers (1)

The answer is the option (i)

Strong polarizing effect due to small size of $Be^{2+}$ makes $BeCO_3$ unstable.

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