Diamagnetic and Paramagnetic MOT Bond Order Magnetism in Chemistry |UPTGT Science 2025 | Topic -16

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Dive deep into the fascinating world of magnetism in chemistry! 🧲🧪 In this video, we'll explore the magnetic behavior of various chemical species, unraveling the secrets behind their attraction or repulsion to magnetic fields.

We'll cover:

* **Inorganic Compounds:** Discover how the electronic configurations of simple inorganic compounds dictate their magnetic properties.
* **Organic Compounds:** Learn about the presence of unpaired electrons in organic molecules and how they contribute to paramagnetism, and how most organic compounds are diamagnetic.
* **d & f Block Elements:** Explore the intriguing magnetic properties of transition metals and lanthanides/actinides. We'll discuss the role of unpaired d and f electrons, crystal field splitting, and how these factors influence their magnetic moments.
* **Coordination Compounds:** Demystify the magnetic behavior of coordination complexes. We'll examine how ligands affect the splitting of d-orbitals, leading to high-spin and low-spin complexes with varying magnetic properties.

Whether you're a student, educator, or simply curious about the interplay between chemistry and magnetism, this video will provide you with a comprehensive overview.

Key concepts covered:

* Paramagnetism
* Diamagnetism
* Ferromagnetism
* Antiferromagnetism
* Ferrimagnetism
* Crystal field theory
* Ligand field theory
* Magnetic moment calculations
* Unpaired electrons

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Questions:
Which of these molecular species is not paramagnetic?
निम्नलिखित आणविक प्रकार में कौन अनुचुम्बकीय नहीं है?
(a) N₂⁺
(b) N₂
(c) O₂
(d) O₂²⁻
The oxygen molecule (O₂) is paramagnetic. This may be explained on the basis of which of the following?
ऑक्सीजन अणु (O₂) अनुचुम्बकीय है। इसकी व्याख्या निम्नलिखित किस आधार पर की जा सकती है?
(a) Hybridization/संकरण
(b) Resonance/अनुनाद
(c) Molecular orbital theory/अणु कक्षक सिद्धान्त
(d) Valence bond theory/संयोजकता आबंध सिद्धान्त
Which of the following has maximum bond strength?
निम्नलिखित में से किसमें अधिकतम बंधन शक्ति है?
(a) O₂⁺
(b) O₂
(c) O₂⁻
(d) O₂²⁻
The magnetic moment of ion is 4.90 B.M. The ion is
आयन का चुंबकीय आघूर्ण 4.90 B.M. है। आयन होगा-
(a) Co³⁺
(b) Fe³⁺
(c) Cr³⁺
(d) V³⁺
The species which is diamagnetic in ground state is
वह प्रजाति जो मूल अवस्था में प्रतिचुम्बकीय होती है, है-
(a) O₂
(b) NO
(c) O₂⁺
(d) NO⁺
Both [Ni(CO)₄] and [Ni(CN)₄]²⁻ are diamagnetic. The hybridization of nickel in these compounds respectively are
[Ni(CO)₄] तथा [Ni(CN)₄]²⁻ दोनों प्रतिचुम्बकीय हैं। इन यौगिकों में निकेल का संकरण क्रमशः है-
Bond order of the following follows the order : O₂⁺, O₂, O₂⁻, O₂²⁻
निम्नलिखित का आबन्ध कोटि, किस क्रम का पालन करता है?
(a) O₂²⁻ , O₂⁻ , O₂ , O₂⁺
(b) O₂⁺ , O₂ , O₂⁻ , O₂²⁻
(c) O₂ , O₂⁺ , O₂⁻ , O₂²⁻
(d) O₂⁻ , O₂²⁻ , O₂⁺ , O₂
Which one of the following shows bond order two?
निम्नलिखित में से कौन बन्ध कोटि प्रदर्शित करता है?
(a) O₂
(b) N₂
(c) He₂
(d) H₂
The number of bonding and antibonding electrons respectively in CO molecule is :
CO अणु में बंधी तथा प्रतिबंधी इलेक्ट्रॉनों की संख्या क्रमशः है:

(a) 10 and 4
(b) 2 and 8
(c) 4 and 2
(d) 2 and 4
Which of the following statements regarding magnetic properties of tripositive (M³⁺) ions of Lanthanoid elements is true?
लैंथेनॉइड तत्वों के त्रिधनात्मक आयनों (M³⁺) के चुम्बकीय गुणों के सम्बन्ध में से निम्न कौन सा कथन सत्य है?

(a) All the M³⁺ ions are paramagnetic.
सभी M³⁺ आयन अनुचुम्बकीय होते हैं।
(b) All except La³⁺ and Lu³⁺ are paramagnetic.
La³⁺ तथा Lu³⁺ के अतिरिक्त सब अनुचुम्बकीय होते हैं।
Only La³⁺ is paramagnetic.
केवल La³⁺ अनुचुम्बकीय है।
(d) All are diamagnetic./सभी प्रतिचुम्बकीय होते हैं।
Which of the following species is paramagnetic in nature:
निम्न में से कौन सी स्पीशीज प्रकृति में अनुचुम्बकीय है।
(a) B₂
(b) C₂
(c) N₂
(d) CN⁻

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