Question:

Complete the following chemical equation:
\(\underline{\hspace{2cm}}\) + CO_2 \rightarrow \text{CaCO}_3 + \text{H}_2\text{O}

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Remember: The reaction between calcium oxide (CaO) and carbon dioxide (CO2) forms calcium carbonate (CaCO3), which is commonly used in limestone.
Updated On: Sep 6, 2025
  • CaO
  • Ca(OH)_2
  • CaH_2
  • CH_3COOH
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The Correct Option is A

Solution and Explanation


Step 1: Chemical reaction context
This is a reaction of calcium oxide with carbon dioxide to produce calcium carbonate and water. The correct reactant is calcium oxide, CaO, which reacts with CO_2 to form CaCO_3 (calcium carbonate) and H_2O (water).
Step 2: Final Answer
The correct chemical equation is:
\[ \text{CaO} + \text{CO}_2 \rightarrow \text{CaCO}_3 + \text{H}_2\text{O} \] \[ \boxed{\text{CaO}} \]

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