1.

Pick out the endothermic reaction out of the following.

A. C+1/2O₂ = CO
B. CO + 3H₂ = CH₄ + H₂O
C. CaCO₃ = CaO + CO₂
D. CO +1/2O₂ = CO₂
Answer» D. CO +1/2O₂ = CO₂


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