Solved UPSC CDS/OTA Question
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Q · Chemical EquationsMedium · 45s
Which reaction represents a combination and exothermic reaction?
TopicChemical Equations
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Carbon and oxygen combine to form CO₂, releasing heat.
Final Answer: Option A - C + O₂ → CO₂