alleryWhich reaction does NOT need heat to proceed?
A2 H₂O → 2 H₂ + O₂
B2 AgCl → 2 Ag + Cl₂
CCaO + H₂O → Ca(OH)₂
DCaCO₃ → CaO + CO₂
Answer & Solution
Correct answer: C. CaO + H₂O → Ca(OH)₂
Slaking of lime is a vigorous combination that releases heat rather than needing it.
The other three are decompositions that require heat, electricity, or sunlight.
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