On heating to 400-500,^oC,relatively unstable | vedclass

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(A) The thermal stability of alkali metal hydrides decreases down the group. $LiH$ is quite stable and decomposes at much higher temperatures. $NaH$ i

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$II, III$

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(A) The thermal stability of alkali metal hydrides decreases down the group. $LiH$ is quite stable and decomposes at much higher temperatures. $NaH$ is relatively less stable and decomposes in the range of $400-500\,^oC$.Regarding carbonates,$Li_2CO_3$ is thermally unstable and decomposes into $Li_2O$ and $CO_2$ upon heating to $400-500\,^oC$. In contrast,$Na_2CO_3$ is highly stable and does not decompose at this temperature.Therefore,both $NaH$ $(II)$ and $Li_2CO_3$ $(III)$ decompose in the given temperature range.

On heating to $400-500\,^oC$,relatively unstable hydrides and carbonates decompose. Which of the following will decompose when heated to $400-500\,^oC$ ?
$(I) \ LiH$ $ $ $(II) \ NaH$ $ $ $(III) \ Li_2CO_3$ $ $ $(IV) \ Na_2CO_3$

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On heating to $400-500\,^oC$,relatively unstable hydrides and carbonates decompose. Which of the following will decompose when heated to $400-500\,^oC$ ?$(I) \ LiH$ $ $ $(II) \ NaH$ $ $ $(III) \ Li_2CO_3$ $ $ $(IV) \ Na_2CO_3$