JEE Main Chemistry question

Not in JEE Main or NEET syllabus

Which sequence of reactions shows correct chemical relation between sodium and its compounds? [DCE 2009]

(A); \quad Na_2O \xrightarrow{CO_2} Na_2CO_3 \xrightarrow{\Delta} Na
(B)Na \xrightarrow{O_2} Na_2O \xrightarrow{H_2O} NaOH \xrightarrow{CO_2} Na_2CO_3 \xrightarrow{\Delta} Na
(C); \quad Na + H_2O \to NaOH \xrightarrow{CO_2} Na_2CO_3 \xrightarrow{\Delta} Na
(D)Na_2CO_3 \xrightarrow{HCl} NaCl \xrightarrow{Electrolysis (molten)} Na + Cl_2Correct

Answer: (D)

Solution

Sequences (A), (B) and (C) all include the step "", but sodium carbonate is thermally very stable and does not decompose to give metallic sodium on heating, so these chains are chemically invalid. The only genuinely valid, industrially real

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Question ID VK-137592