question_answer

A metal carbonate W on reacting with an acid gives a gas X which when passed through a solution Y gives the carbonate back. Solution Y reacts with gas Z to form a compound P used for decolourisation. Identify W, X, Y, Z and P.

A)

W	X	Y	Z	P
\[N{{a}_{2}}C{{O}_{3}}\]	\[C{{O}_{2}}\]	\[NaOH\]	\[C{{l}_{2}}\]	\[NaCl\]

               

B)

W	X	Y	Z	P
\[MgC{{O}_{3}}\]	\[{{O}_{2}}\]	\[MgO\]	\[C{{O}_{2}}\]	\[MgHC{{O}_{3}}\]

               

C)

W	X	Y	Z	P
\[{{K}_{2}}C{{O}_{3}}\]	\[{{O}_{2}}\]	\[KOH\]	\[C{{O}_{2}}\]	\[KHC{{O}_{3}}\]

               

D)

W	X	Y	Z	P
\[CaC{{O}_{3}}\]	\[C{{O}_{2}}\]	\[Ca{{(OH)}_{2}}\]	\[C{{l}_{2}}\]	\[CaOC{{l}_{2}}\]