IGNOU BSC CHE 1 Atoms and Molecules Solved Assignment English

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Title Name	IGNOU BSC CHE 1 Atoms and Molecules Solved Assignment English
Type	Soft Copy (E-Assignment) .pdf
University	IGNOU
Degree	BACHELOR DEGREE PROGRAMMES
Course Code	BSC
Course Name	Bachelor in Science
Subject Code	CHE 1
Subject Name	Atoms and Molecules
Year	2025
Session	-
Language	English
Assignment Code	CHE 1/Assignment-1/2025
Product Description	Assignment of BSC (Bachelor in Science) 2025. Latest CHE 01 2025 Solved Assignment Solutions
Format	Ready-to-Print PDF (.soft copy)

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CHE 1 2025 - English

Tutor Marked Assignment CHE-01: Atoms and Molecules

Course Code: CHE-01

Assignment Code: CHE-01/TMA/2025

Maximum Marks: 100

Attempt all the questions. Each question carries 10 marks.

1.a) Describe the common features which can be explained by the theoretical model of Bohr? Briefly write the limitation of this model.

b) Calculate the ionization energy of hydrogen atom using Bohr's theory.

2.a) Derive an expression for calculating energy values corresponding a 3 for a particle in one dimensional box.

b) Write the values of four quantum numbers for 3d electrons.

3.a) Explain the reason for the variation of the first ionization energies of the third period elements.

b) Calculate the lattice energy (in Units kJ mol^-1) for ZnO crystal using Eq. 3.4 based on electrostatic model and using a Born-Haber cycle. Compare the two answers and comment on any difference.

Useful data:

Medelung constant (4) - 1.6411

Born Constant (n)-8

Internuclear distance (a) = 199 pm

Zn(s) + 1/2 O₂(g) → ZnO(s) ΔH_f-350.5 kJ mol^-¹

Zn(s) → Zn(g) ΔH_s-130.4 kJ mol^-¹

Zn(g) → Zn⁺ (g) J(Zn)-906.3 kJ mol^-¹

Zn⁺(s) → Zn²⁺(g) J(Zn⁺)-1733 kJ mol^-¹

1/2 0₂(g) → O(g) 1/2ΔH_d-248.5 kJ mol^-¹

0(g)→O^-(g) E_A(O)-141 kJmol^-¹

O^-(g) →0²(g) E_A(O^-)--780 kJ mol^-¹

4. a) In carbonate ion, all the three C-O bonds have identical bond length. Explain.

b) Explain the type of hybridization in phosphorous pentafluoride.

5.a) By writing molecular orbital configuration for each of following molecules calculate the bond order and also determine whether it is paramagnetic or diamagnetic.

(i) NO

(ii) CO

(iii) 0_2⁺

b) Using suitable examples define gerade and ungerade orbitals.

6.a) The dipole moment of HBr is 2.60 x 10^-30 Cm and interatomic distance 141 pm. What is the percentage ionic character of HBr? (6)

b) Draw all of the stereoisomers of 2,3-butandiol, label meso compounds and pairs of enantiomer.

c) What is the predicted magnetic moment of Cu⁺and Cu²⁺ ions in a Unit (Atomic number of Cu 29)?

7.a) Given that the spacing of the lines in the microwave spectrum of ²⁴Al¹H is constant at 12.604 cm. Calculate the moment of inertia and bond length of the molecule.

b) Determine the wavelength for a transition from the v = 0 to the v = 1 level. Is this transition in the IR region of the electromagnetic spectrum?

c) Which of the following molecules exhibit rotational and or vibrational spectra H2, HF, CO, NO

8. a) From the infrared spectrum given below, identify the possible functional groups corresponding to the peaks indicated by the arrows.

Image ignouacademy-com-ignou-che-1-solved-assignment-html-p-ignou-19635

b) Explain why Image ignouacademy-com-ignou-che-1-solved-assignment-html-p-molecules-85398 π→ π* transitions are the most useful transition in UV-VIS spectroscopy?

c) UV-VIS absorption spectra are broad band spectra. Explain.

9. a) Normal water contains isotope of hydrogen ³H, tritium. It has a half-life of 12.3 years. Determine the age of a bottle of wine whose ³H radiations is about 1/10 that present in new wine.

b) Complete following equations:

i) ³⁰P + ... → ³⁰Si

ii) ¹⁰B+n→ ...+a

iii) ²⁰Ne+¹³⁶Ba→ ¹⁵⁰Dy+...

iv) ... +²H→²²Na+a

v) ²⁴¹Am + ... → ²⁴³Bk + 2n

10. a) Arrive at the Lewis structure of XeF4 using the steps given in Unit 3.

b) Predict the hybridization state of each carbon atom in allene which has the following structure:

CH₂= C = CH₂

c) Calculate the number of normal modes of vibration for the following compounds:

i) H₂O

CH₄

ii) HBr

CHE 1 2025 - Hindi

षिक्षक जांच सत्रीय कार्य

परमाणु और अणु

रसायन विज्ञान में ऐच्छिक पाठ्यक्रम

पाठ्यक्रम कोड: CHE-01

सत्रीय कार्य कोड: TMA/2025

अधिकतम अंक : 100

नोट: सभी प्रष्नों के उत्तर दीजिए। प्रत्येक प्रष्न के 10 अंक हैं।

क) उन सभी तथ्यों की व्याख्या कीजिए जिन्हें बोर के सैद्धांतिक मॉडल से समझा जा सकता है। संक्षेप में इस मॉडल की सीमाओं को लिखिए। (5)

ख) बोर सिद्धांत के उपयोग से हाइड्रोजन परमाणु की आयन ऊर्जा का परिकलन कीजिए।

क) एक वीमा वाले बॉस में n = 3 के संगत कण की ऊर्जा का मान परिकलित करने के लिए व्यंजक का व्युत्पन्न कीजिए।

ख) 3d इलेक्ट्रॉन के लिए चारों क्वांटम संख्याओं के मान लिखिए।

क) तृतीय आवर्त के तत्वों की प्रथम आयनन ऊर्जाओं में विविधता का कारण स्पष्ट कीजिए।

ख) स्थिर-वैद्युत मॉडल के आधार पर समीकरण 3.4 के उपयोग से और बॉन हाबर् चक्र से ZnO क्रिस्टल के लिए kJ mol¹ मात्रक में जालक ऊर्जा परिकलित कीजिए।

उपयोगी आंकड़ेंः

मैडैलुंग स्थिरांक (A) = 1.6411

बॉर्न स्थिरांक (n) = 8

अंतरानाभिक दूरी (a) = 199 pm

$ce{Zn(s)+1/2 O2(g)->ZnO(s)}quadDelta H_f=-350.5;mathrm{kJ;mol^{-1}}$

$ce{Zn(s) o Zn(g)}qquadDelta H_{sub}=130.4 ext{kJ mol}^{-1}$

$ce{Zn(g) o Zn+(g)}qquad I(Zn)=906.3 ext{kJ mol}^{-1}$

$ce{Zn+(g) o Zn^{2+}(g)}qquad I(ce{Zn+})=1733 ext{kJ mol}^{-1}$

$frac{1}{2} ext{O}_2( ext{g}) ightarrow ext{O}( ext{g})quadfrac{1}{2}Delta H_ ext{d}=248.5, ext{kJ}, ext{mol}^{-1}$

$ce{O(g) o O^{-}(g)}qquad E_{A}(O)=141 ext{kJ mol}^{-1}$

$ce{O^{-}(g) o O^{2-}(g)}qquad E_{A}(O^{-})=-780 ext{kJ mol}^{-1}$

क) कार्बोनेट आयन में सभी तीनों C-O आबंध एक जैसे हैं, समझाइए ।

ख) फॉस्फोरस पेंटाफ्लुओराइड में संकरण के प्रकार की व्याख्या कीजिए।

क) निम्नलिखित प्रत्येक के लिए अणु कक्षक विन्यास लिखकर आबंध क्रम ज्ञात कीजिए और निर्धारित कीजिए कौन अनुचुंबकीय

या प्रतिचुंबकीय है।

(i) NO

(ii) CO

(iii) O₂⁺

ख) उपयुक्त उदाहरणें से गिराड और अनगिराड को परिभाषित कीजिए।

क) HBr का द्विध्रुव आघूर्ण 2.60 × 10^-30 Cm तथा अत्तरापरमाणुक दूरी 141 pm है। HBr का प्रतिशत आयनिक लक्षण क्या होगा?

ख) 2,3-ब्युटेनडाइऑल के त्रिविम समावयी के आरेख बनाइए। मैसो यौगिक और ऐनौष्टिओमर के तौर पर चिहिनत कीजिए।

ग) μB मात्रक में Cu⁺ और Cu²⁺ आयनों का प्रायुक्त चुंबकीय आघूर्ण के मान क्या होंगे। (Cu का परमाणु संख्या 29 है)

क) ²⁴ Al¹H के घूर्णन स्पेक्ट्रम में लाइनों के बीच की जगह 12.604 cm^-1 है। अणु के जड़त्व आघूर्ण और आबंध लम्बाई परिकलित कीजिए।

ख) संक्रमण v=0 से = 1 स्तर के लिए तरंग दैर्ध्य को निर्धारित कीजिए। क्या यह तरंग दैर्ध्य विद्युत्-चुम्बकीय के IR क्षेत्र में आता है?

ग) निम्नलिखित में से कौन अणु घूर्णन और / या कंपन स्पेक्ट्रा दर्शाएगा? H₂, HF, CO, NO

क) नीचे दिए अवरक्त स्पेक्ट्रम में तीर द्वारा इंगित शिखरों के अनुरूप संभव अभिलकीय ग्रुपों का अभिनिर्धारित कीजिए।

Image ignouacademy-com-ignou-che-1-solved-assignment-html-p-molecules-69949

ख) समझाइए, UV-VIS स्पेक्ट्रमिकी में ? → ?* * संक्रमण क्यों इतने उपयोगी हैं?

ग) UV-VIS अवशोषण स्पेक्ट्रा चौड़े बैंड स्पेक्ट्रा हैं। समझाइए।

क) प्रकृतिक जल में हाइड्रोजन के समस्थानिक ³H, ट्राइटियम उपस्थित होता है। इसकी अर्द्धआयु 12.3 वर्ष है। वाइन की बोतल की आयु का परिकलन कीजिए जिसमें ³H विकिरण की मात्रा वर्तमान नई वाइन की तुलना में 1/10 हैं।

ख) निम्न समीकरण को पूर्ण कीजिए:

i) ³⁰ P + ... → ³⁰Si

ii) ¹⁰B+ n → ... + α

iii) ²⁰Ne + ¹³⁶Ba → ¹⁵⁰Dy + ...

iv) ...+ ²H → ²²Na + α

v) ²⁴¹Am +... ²⁴³Bk + 2n

10. क) इकाई 3 में दिए गए चरणों का प्रयोग करके XeF4 के लिए लूइस संरचना लिखिए।

ख) ऐलीन, जिसकी सरंचना नीचे दी गई है, में प्रत्येक कार्बन परमाणु के लिए संकरण अवस्था का पूर्वानुमान कीजिए।

CH₂ = C = CH₂

इसका कक्षक अतिव्यापन आरेख भी खींचिए।

ग) निम्नलिखित यौगिकों के लिए सामान्य कंपन विधाओं की संख्या परिकलित कीजिए।

i) H₂O

ii)CH₄

iii) HBr

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Language: English

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Product Information

Course Name	Bachelor in Science
Course Code	BSC
Subject Code	CHE 1
Subject	Atoms and Molecules
Programme	BACHELOR DEGREE PROGRAMMES Courses
Language	English
Material Type	Solved Assignment – Soft Copy / PDF

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