Identify the correct statement from the following

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Nitrates of all alkali metals give NO2 and O2 on heating

Except LiHCO3, all the hydrogen carbonates of alkali metals are obtained in solid form

Except LiCl, all the chlorides of alkali metals are deliquescent

Carbonates of all alkali metals give CO2 on thermal decomposition

answer is B.

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Detailed Solution

4LiNO3→∆2Li2O+4NO2↑+O2↑ 2MNO3M=Na,K,Rb,Cs→∆2MNO2+O2Lithium nitrate undergo decomposition differently when compared to the decomposition of nitrates of other alkali metal nitrates.→ LiHCO3 - It is not solid [liquid]NaHCO3,KHCO3,RbHCO3,CsHCO3 are solids→ LiCl is deliquescent, NaCl is deliquesent due to presence of CaCl2 & MgCl2→ Na2CO3 and other corbonates can't undergo decomposition only Li2CO3 undergoes decomposition Li2CO3→∆Li2O+CO2

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