Q. Which sequence of reactions shows correct chemical relation between sodium and its compounds?
A) $Na + O_{2} \rightarrow Na_{2}O\ \overset{\ \ \ \ \ HCl\ (aq)}{\rightarrow}\ NaCl\ \overset{\ \ \ \ \ CO_{2}\ \ \ }{\rightarrow}\ Na_{2}CO_{3}\overset{\ \ \ \ \ \mathrm{\Delta}\ \ \ \ \ }{\rightarrow}\ Na$
B) $Na\ \overset{{\ \ O}_{2}\ \ \ \ }{\rightarrow}\ Na_{2}O\ \overset{{\ \ H}_{2}O\ \ \ \ \ }{\rightarrow}\ NaOH\ \overset{\ \ \ \ \ CO_{2}\ \ \ }{\rightarrow}\ Na_{2}CO_{3}\overset{\ \ \ \ \ \mathrm{\Delta}\ \ \ \ \ }{\rightarrow}\ Na$
C) $Na + H_{2}O \longrightarrow NaOH\ \overset{\ \ \ \ \ HCl\ \ \ \ \ \ }{\rightarrow}\ NaCl\ \overset{\ \ \ \ \ CO_{2}\ \ }{\rightarrow}\ Na_{2}CO_{3}\overset{\ \ \ \ \ \mathrm{\Delta}\ \ \ \ \ }{\rightarrow}\ Na$
D) $Na + H_{2}O\ \longrightarrow NaOH\ \overset{\ \ \ {CO}_{2}\ \ \ }{\rightarrow}{Na}_{2}{CO}_{3}\overset{\ \ \ \ \ HCl\ \ \ \ \ \ }{\rightarrow}\ NaCl\ \overset{\ \ \ \ \ Electrolysis\ \ \ \ \ \ }{\rightarrow}\ Na + C\overline{l}$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ (molten)$
Explanation
(d)
$2Na + 2H_{2}O\ \rightarrow 2NaOH + H_{2} \uparrow$
$2NaOH + CO_{2} \rightarrow Na_{2}CO_{3} + H_{2}O$
$Na_{2}CO_{3} + 2HCl\ \rightarrow 2NaCl + H_{2}O + CO_{2}$
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Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.