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Question
Explain the following with suitable examples:
Paramagnetism
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Solution
- The substances that are attracted by a magnetic field are called paramagnetic substances.
- Some examples of paramagnetic substances are O2, Cu2+, Fe3+, etc.
- Paramagnetic substances get magnetised in a magnetic field in the same direction but lose magnetism when the magnetic field is removed.
- To undergo paramagnetism, a substance must have one or more unpaired electrons. This is because the unpaired electrons are attracted by a magnetic field, thereby causing paramagnetism.
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Match items of List - I with those of List - II:
| List - I | List - II | ||
| (Property) | (Example) | ||
| (A) | Diamagnetism | (i) | MnO |
| (B) | Ferrimagnetism | (ii) | O2 |
| (C) | Paramagnetism | (iii) | NaCl |
| (D) | Antiferromagnetism | (iv) | Fe3O4 |
Choose the most appropriate answer from the options given below:
Which one of the following compounds is diamagnetic and colourless?
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(Atomic number of Fe = 26, Cu = 29, Co = 27 and Ni = 28)
