Which of the following metal carbonates decom | vedclass

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(B) Most alkali metal carbonates are thermally stable and do not decompose upon heating. However,$Li_2CO_3$ is an exception due to the small size of t

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$Li_2CO_3$

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(B) Most alkali metal carbonates are thermally stable and do not decompose upon heating. However,$Li_2CO_3$ is an exception due to the small size of the $Li^+$ ion,which leads to high polarizing power and instability of the carbonate ion. $Li_2CO_3$ decomposes upon heating as follows: $Li_2CO_3 \rightarrow Li_2O + CO_2$ Other alkali metal carbonates like $Na_2CO_3$,$K_2CO_3$,and $Cs_2CO_3$ are thermally stable and do not decompose at ordinary heating temperatures.

List-$I$ (Metal)	List-$II$ (Emitted light wavelength $(nm)$)
$A. Li$	$I. 670.8$
$B. Na$	$II. 589.2$
$C. Rb$	$III. 780.0$
$D. Cs$	$IV. 455.5$

Which of the following metal carbonates decomposes upon heating?

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Match the List-$I$ with List-$II$.

List-$I$ (Metal) List-$II$ (Emitted light wavelength $(nm)$)

$A. Li$ $I. 670.8$

$B. Na$ $II. 589.2$

$C. Rb$ $III. 780.0$

$D. Cs$ $IV. 455.5$

Choose the most appropriate answer from the options given below:

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