Which of the following metal carbonates decomposes on heating?
A
MgCO3
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B
Na2CO3
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C
K2CO3
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D
Rb2CO3
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Solution
The correct option is AMgCO3 All metal carbonates of 1A and 2A group elements are stable except carbonates of magnesium in 2A and lithium in 1A which decomposes on heating.