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CSS Solved Papers
Physics Chemistry

Engineering :: Chemical Technology

  Which of the following reactions is an exothermic reaction?
[A]. CaO(s) + 3C(s) ?CaC2 + CO(g)[B]. CaCO3(s) ? CaO(s) + CO2(g)
[C]. CaC2(s) + H2O(I) ? Ca(OH)2 + C2H2(g)[D]. C(s) + CO2(g) ?2CO(g)

Answer: Option C
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