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JIPMER 2012

Exam: JIPMER
Year: 2012
Subject: Chemistry
Chapter: s Block Elements

JIPMER 2012 · Chemistry · s Block Elements

Which of the following metal carbonates decomposes on heating?

Which of the following metal carbonates decomposes on heating?

Options

A $\mathrm{MgCO}_3$
B $\mathrm{Na}_2 \mathrm{CO}_3$
C $\mathrm{K}_2 \mathrm{CO}_3$
D $\mathrm{Rb}_2 \mathrm{CO}_3$

Correct answer

A. $\mathrm{MgCO}_3$

Step-by-step solution

\mathrm{MgCO}_3

decomposes on heating to give MgO and

\mathrm{CO}_2

while alkali metal carbonates (except

\mathrm{Li}_2 \mathrm{CO}_3

) do not.

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