Redox Reactions - SS1 Chemistry Past Questions and Answers - page 1
Oxidation is the process that involves:
Gain of electrons
Loss of electrons
Formation of covalent bonds
Increase in temperature
Reduction is the process that involves:
Gain of electrons
Loss of electrons
Formation of ionic bonds
Decrease in temperature
In a redox reaction, the species that undergoes oxidation is called:
Oxidising agent
Reducing agent
Catalyst
None of the above
In a redox reaction, the species that undergoes reduction is called:
Oxidising agent
Reducing agent
Catalyst
None of the above
The oxidising agent is responsible for:
Gaining electrons
Losing electrons
Providing a medium for the reaction
Both gaining and losing electrons
Which of the following statements is true about oxidation and reduction?
Oxidation and reduction always occur together.
Oxidation and reduction can occur independently.
Oxidation always involves a gain of electrons.
Reduction always involves a loss of electrons.
Which of the following is an example of oxidation?
Conversion of water into hydrogen and oxygen gas
Rusting of iron
Formation of table salt from sodium and chlorine
Photosynthesis in plants
Which of the following is an example of reduction?
Conversion of water into hydrogen and oxygen gas
Rusting of iron
Formation of table salt from sodium and chlorine
Photosynthesis in plants
In a redox reaction, the electrons are transferred from the:
Oxidising agent to the reducing agent
Reducing agent to the oxidising agent
Catalyst to the reactants
None of the above
Define oxidation and reduction and explain their significance in chemical reactions. Provide examples to illustrate these processes.