Question

Match items of List - I with those of List - II: 

Choose the most appropriate answer from the options given below : 
 

• A. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
• B. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
• C. (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
• D. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)

Hint:

Memorize key examples for each type of magnetism: - Diamagnetic: N\(_2\), H\(_2\)O, NaCl, Benzene (paired electrons). - Paramagnetic: O\(_2\), Cu\(^{2+}\), Fe\(^{3+}\) (unpaired electrons). - Ferromagnetic: Fe, Co, Ni (permanent magnets). - Antiferromagnetic: MnO. - Ferrimagnetic: Fe\(_3\)O\(_4\), ferrites.

Answer 1

The Correct Option is A

The question requires matching magnetic properties from List-I with examples from List-II. Let's examine each property: 

1. Diamagnetism: This property is characterized by materials that create an induced magnetic field in a direction opposite to an externally applied magnetic field and are repelled by a magnetic field. A common example is \(NaCl\), which is not attracted to magnets. Therefore, (a) matches with (iii).
2. Ferrimagnetism: This occurs when the magnetic moments of the atoms on different sublattices are opposed, as in the case of \(Fe_3O_4\) (magnetite). Thus, (b) matches with (iv).
3. Paramagnetism: These materials are attracted to external magnetic fields and their magnetism is due to the presence of unpaired electrons. Oxygen, \(O_2\), is a well-known paramagnetic substance due to its unpaired electrons. Hence, (c) matches with (ii).
4. Antiferromagnetism: In these materials, adjacent ions are aligned opposite to each other leading to a cancelation of the net magnetic moment. An example is \(MnO\). Therefore, (d) matches with (i).

The final matches are:

• (a)-(iii): Diamagnetism - NaCl
• (b)-(iv): Ferrimagnetism - Fe₃O₄
• (c)-(ii): Paramagnetism - O₂
• (d)-(i): Antiferromagnetism - MnO

Hence, the correct answer is:

(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)