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IGNOU CHE 1 SOLVED ASSIGNMENT 2025

IGNOU CHE 1 SOLVED ASSIGNMENT 2025


IGNOU CHE 1 Solved Assignment 2025
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IGNOU CHE 1 Solved Assignment 2025

This is latest Solved Assignment of CHE 1 of BSC . 

  • Latest 2025 Solved Assignment
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  • CHE 1 ( Atoms and Molecules )
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Last Date of Submission of IGNOU CHE-01 (BSC) 2025 Assignment is for January 2025 Session: 30th September, 2025 (for December 2025 Term End Exam).
Semester Wise
January 2025 Session:
30th March, 2025 (for June 2025 Term End Exam).
July 2025 Session: 30th September, 2025 (for December 2025 Term End Exam).

Title NameIGNOU CHE 1 Solved Assignment 2025
TypeSoft Copy (E-Assignment) .pdf
UniversityIGNOU
DegreeBACHELOR DEGREE PROGRAMMES
Course CodeBSC
Course NameBachelor in Science
Subject CodeCHE 1
Subject NameAtoms and Molecules
Year2025
Session
LanguageEnglish Medium
Assignment CodeCHE-01/Assignmentt-1//2025
Product DescriptionAssignment of BSC (Bachelor in Science) 2025. Latest CHE 01 2025 Solved Assignment Solutions
Last Date of IGNOU Assignment Submission
Last Date of Submission of IGNOU CHE-01 (BSC) 2025 Assignment is for January 2025 Session: 30th September, 2025 (for December 2025 Term End Exam).
Semester Wise
January 2025 Session:
30th March, 2025 (for June 2025 Term End Exam).
July 2025 Session: 30th September, 2025 (for December 2025 Term End Exam).

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Questions Included in this Help Book

Ques 1.

 

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

Ques 2.

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

Ques 3.

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

Ques 4.

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

Ques 5.

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

Ques 6.

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) ΔHf-350.5 kJ mol

Zn(s) → Zn(g)  ΔHs-130.4 kJ mol

Zn(g) → Zn+ (g) J(Zn)-906.3 kJ mol

Zn+(s) → Zn2+(g) J(Zn+)-1733 kJ mol

1/2 02(g) → O(g) 1/2ΔHd-248.5 kJ mol

0(g)→O-(g) EA(O)-141 kJmol

O-(g) →02(g) EA(O-)--780 kJ mol

Ques 7.

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

Ques 8.

Explain the type of hybridization in phosphorous pentafluoride.

Ques 9.

Explain the type of hybridization in phosphorous pentafluoride.

Ques 10.

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) 02+

Ques 11.

Using suitable examples define gerade and ungerade orbitals.

Ques 12.

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?

Ques 13.

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

Ques 14.

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

Ques 15.

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.

Ques 16.

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.

Ques 17.

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

Ques 18.

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

Ques 19.

Explain why π→ π* transitions are the most useful transition in UV-VIS spectroscopy? 

Ques 20.

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

Ques 21.

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.

Ques 22.

Complete following equations:

i) 30P + ... 30Si

ii) 10B+n...+a

iii) 20Ne+136Ba150Dy+...

iv) ... + 2H 22Na+a

v) 241Am + ... 243Bk + 2n

Ques 23.

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

Ques 24.

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

CH2 = C = CH2

Ques 25.

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

(i) H2

(ii)  CH4

(iii) HBr

Ques 26.

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

Ques 27.

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

Ques 28.

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

Ques 29.

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

Ques 30.

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

Ques 31.

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

equation

equation

equation

equation

equation

equation

equation

4.

Ques 32.

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

Ques 33.

फॉस्फोरस पेंटाफ्लुओराइड में संकरण के प्रकार की व्याख्या कीजिए।

Ques 34.

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+

Ques 35.

उपयुक्त उदाहरणें से गिराड और अनगिराड को परिभाषित कीजिए।

Ques 36.

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

Ques 37.

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

Ques 38.

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

Ques 39.

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।

Ques 40.

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?

Ques 41.

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

Ques 42.

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

 

Ques 43.

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

Ques 44.

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

Ques 45.

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।

Ques 46.

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

Ques 47.

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

Ques 48.

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।

Ques 49.

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

i) H₂O

ii)CH4

iii) HBr

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