A) \[HCO_{3}^{-}\]
B) \[CO_{3}^{2-}\]
C) \[NO_{3}^{-}\]
D) \[SO_{4}^{2-}\]
Correct Answer: A
Solution :
\[MgC{{l}_{2}}+2NaHC{{O}_{3}}\to Mg{{(HC{{O}_{3}})}_{2}}(aq)+2NaCl\] \[Mg{{(HC{{O}_{3}})}_{2}}(aq)\xrightarrow{\Delta }\underset{\text{(White ppt}\text{.)}}{\mathop{MgC{{O}_{3}}}}\,\downarrow +{{H}_{2}}O+C{{O}_{2}}\uparrow \]
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