Multiple Choice
Which type of reaction involves the removal of electrons from an atom or molecule?
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6. Chemical Quantities & Aqueous Reactions
Redox Reactions
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In an oxidation-reduction (redox) reaction, which of the following statements is correct?
A
The substance that gains electrons is oxidized.
B
No electrons are transferred between substances.
C
The substance that loses electrons is oxidized.
D
Both substances gain electrons.
Verified step by step guidance1
Understand the definitions of oxidation and reduction in a redox reaction: Oxidation is the loss of electrons, and reduction is the gain of electrons.
Recognize that in any redox reaction, electrons are transferred from one substance to another; one substance loses electrons (oxidized) and another gains electrons (reduced).
Analyze each statement: 'The substance that gains electrons is oxidized' is incorrect because gaining electrons means reduction, not oxidation.
'No electrons are transferred between substances' is incorrect because electron transfer is fundamental to redox reactions.
'Both substances gain electrons' is incorrect because one substance must lose electrons while the other gains them; they cannot both gain electrons simultaneously.
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