| \[\underset{\begin{smallmatrix} (Commonly\, \\ used\,in\,ba\operatorname{kery}\,products) \end{smallmatrix}}{\mathop{Salt\,X}}\,\to \underset{\begin{smallmatrix} (Common\, \\ constiuent\,of\, \\ washing\,powder) \end{smallmatrix}}{\mathop{Salt\,}}\,Y+\underset{\begin{smallmatrix} (Truns\,lime \\ water\,milky) \end{smallmatrix}}{\mathop{\,Gas\,Z}}\,\] |
A)
X
Y
Z
Sodium carbonate
Water
Carbon dioxide
B)
X
Y
Z
Sodium hydrogen carbonate
Sodium carbonate
Carbon dioxide
C)
X
Y
Z
Sodium carbonate
Sodium chloride
Carbon dioxide
D)
X
Y
Z
Sodium hydrogen carbonate
Calcium carbonate
Carbon dioxide
Correct Answer: B
Solution :
\[\underset{\begin{smallmatrix} Sodium\,hydroen \\ carbonate \\ (Baking\,soda)(X) \end{smallmatrix}}{\mathop{2NaHC{{O}_{3(s)}}}}\,\xrightarrow{Heat}\underset{\begin{smallmatrix} Sodium \\ carbonate \\ (Y) \end{smallmatrix}}{\mathop{N{{a}_{2}}C{{O}_{3(s)}}}}\,+{{H}_{2}}{{O}_{(l)}}+\underset{\begin{smallmatrix} Carbon \\ dioxide \\ (Z) \end{smallmatrix}}{\mathop{C{{O}_{2(g)}}}}\,\] \[\underset{\begin{smallmatrix} Carbon \\ dioxide \\ (Z) \end{smallmatrix}}{\mathop{C{{o}_{2(g)}}}}\,+\underset{\begin{smallmatrix} Lime \\ water \end{smallmatrix}}{\mathop{Ca{{(OH)}_{2(aq)}}}}\,\xrightarrow{{}}\underset{\begin{smallmatrix} White\,ppt. \\ (milkiness) \end{smallmatrix}}{\mathop{CaC{{O}_{3(s)}}}}\,+{{H}_{2}}{{O}_{(l)}}\]
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