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Question
The process of respiration is:
(a) an oxidation reaction which is endothermic
(b) a reduction reaction which is exothermic
(c) a combination reaction which is endothermic
(d) an oxidation reaction which is exothermic
Solution
(d) an oxidation reaction that is exothermic
The food that we eat breaks down into simple compounds during digestion. For example, potatoes, bread and rice, which contain carbohydrates, breaks down to give glucose. Glucose combines with oxygen to give energy, so it is a oxidation reaction because addition of oxygen takes place; since energy is released in this process, it is also an exothermic reaction.
The chemical reaction is given as follows:
C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy
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RELATED QUESTIONS
Which of the statements about the reaction below are incorrect?
\[\ce{2PbO(s) + C(s) → 2Pb(s) + CO2(g)}\]
- Lead is getting reduced.
- Carbon dioxide is getting oxidised.
- Carbon is getting oxidised.
- Lead oxide is getting reduced.
Fill in the blank
Oxidation is the removal of ......................and addition of ....................
How would you change a metal like Cu into its ions?
Identify from the reaction the reactants that undergo oxidation and reduction.
Fe + S → FeS
Name:
a gas that is oxidizing as well as a reducing agent.
Name:
a solid that is an oxidizing agent.
Choose the odd one out and write the reason:
Identify the following reactions as oxidation/reduction/redox reaction
Zn + CuSO4 → Cu + ZnSO4
Identify the following reactions as oxidation/reduction/redox reaction
2Mg +O2 → 2MgO
State the change in colour observed in following case mentioning the reason:
Copper powder is strongly heated in air.
