Multiple Choice
What can happen during the reduction of an atom or molecule?
6. Chemical Quantities & Aqueous Reactions
Redox Reactions
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In which reaction is molecular oxygen (O2) produced?
A
2NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(l)
B
2H2O2(aq) → 2H2O(l) + O2(g)
C
2KClO3(s) → 2KCl(s) + 3O2(g)
D
C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(l)
Verified step by step guidance1
Identify the chemical reactions given in the problem. There are four reactions provided.
Understand that the task is to determine which reaction produces molecular oxygen (O2) as a product.
Examine each reaction to see if O2 appears on the right side of the equation, which indicates it is a product.
For the first reaction, 2NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(l), check the products: Na2CO3, CO2, and H2O. O2 is not produced here.
For the second reaction, 2H2O2(aq) → 2H2O(l) + O2(g), check the products: H2O and O2. O2 is produced here, so this reaction is one of the correct answers.
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