Chemistry · Chemical Reactions
In which of the following reactions do two compounds combine to form a new compound?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1H2 + Cl2 → 2HCl
- 22Na + Cl2 → 2NaCl
- 3C + O2 → CO2
- 4CaO + CO2 → CaCO3✓
Correct answer
CaO + CO2 → CaCO3
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