Which of the following metal carbonate produce the corresponding metal on strong heating?

Which of the following metal carbonates is decomposed on heating ?

Which of the following metal carbonates is decomposed on heating?

Which of the following metal has stable carbonates ?

Which of the following oxides cannot be reduced by carbon to the corresponding metal-

Which of the following alkali metal carbonates decomposes easily by heat

Which one of the following nitrates does not give the corresponding metallic oxide, nitrogen dioxide and oxygen on heating?