Which of the following does not give metal oxide \( \mathrm{P} \) on heating W (1) \( \mathrm{Na...

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Which of the following does not give metal oxide
\( \mathrm{P} \)
on heating
W
(1) \( \mathrm{Na}_{2} \mathrm{CO}_{3} \)
(2) \( \mathrm{K}_{2} \mathrm{CO}_{3} \)
(3) \( \mathrm{Rb}_{2} \mathrm{CO}_{3} \)
(4) All of these
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