SELECT * FROM question_mgmt as q WHERE id=1758 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=9 AND chapterId=56 and ex_no='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 12th chemistry The Solid State explain the following with suitable examples

Question:

Explain the following with suitable examples:

(i) Ferromagnetism

(ii)Paramagnetism

(iii)Ferrimagnetism

(iv)Antiferromagnetism

(v)12-16 and 13-15 group compounds.

Answer:

(i) Ferromagnetism – The substances which are strongly attracted by the magnetic field and show permanent magnetism even when the magnetic field is removed are known as ferromagnetic substances. When there is spontaneous alignment of magnetic moments of domain in the same direction, ferromagnetism happens.

(ii) Paramagnetism- The substances are weakly attracted by a magnetic field. They are magnetised in a magnetic field in the same direction. They lose their magnetism in the absence of magnetic field. Paramagnetism is due to presence of one or more unpaired electrons which are attracted by the magnetic field.

(iii) Ferrimagnetism- When the magnetic moment of domains are aligned in parallel and antiparallel directions in unequal numbers resulting in net magnetic moment, ferrimagnetism happens.

(iv) Antiferromagnetism- Substances showing antiferromagnetism have domain structure similar to ferromagnetic substance, but their domains are oppositely oriented and cancel out each other's magnetic moment.

(v) 12-16 & 13-15 group - The solid binary compound prepared by combining elements of group 12 & 16 are called 12-16 compound. The compound prepared by combining elements of group 13 & 15 are called 13-15 compounds. These compounds are used as semiconductor.


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