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Question
What do you understand by redox reactions? Explain oxidation and reduction in terms of loss or gain of electrons.
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Solution
Transfer of electron(s) is involved in the formation of an electrovalent bond. The electropositive atom undergoes oxidation, while the electronegative atom undergoes reduction. This is known as a redox process.
Oxidation: In the electronic concept, oxidation is a process in which an atom or ion loses electron(s).
Zn → Zn2+ + 2e-
Reduction: In the electronic concept, the reduction is a process in which an atom or ion accepts electron(s).
Cu2+ + 2e-→ Cu
RELATED QUESTIONS
Five atoms are labelled from A to E.
| Atoms | Mass No. | Atomic No. |
| A | 40 | 20 |
| B | 19 | 9 |
| C | 7 | 3 |
| D | 16 | 8 |
| E | 14 | 7 |
(a) Which one of these atoms:
(i) contains 7 protons,
(ii) has an electronic configuration 2, 7?
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(c) predict which are: (i) metals, (ii) non-metals?
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\[\ce{Pb -> Pb^2+ + 2e-}\]
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