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IGNOU BCHCT 131 SOLVED ASSIGNMENT 2025

IGNOU BCHCT 131 SOLVED ASSIGNMENT 2025


IGNOU BCHCT 131 Solved Assignment 2025
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IGNOU BCHCT 131 Solved Assignment 2025

This is latest Solved Assignment of BCHCT 131 of BSCG . 

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Last Date of Submission of IGNOU BCHCT-131 (BSCG) 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 BCHCT 131 Solved Assignment 2025
TypeSoft Copy (E-Assignment) .pdf
UniversityIGNOU
DegreeBACHELOR DEGREE PROGRAMMES
Course CodeBSCG
Course NameBachelor of Science
Subject CodeBCHCT 131
Subject NameAtomic Structure, Bonding, General Organic Chemistry and Aliphatic Hydrocarbons
Year2025
Session
LanguageEnglish Medium
Assignment CodeBCHCT-131/Assignmentt-1//2025
Product DescriptionAssignment of BSCG (Bachelor of Science) 2025. Latest BCHCT 131 2025 Solved Assignment Solutions
Last Date of IGNOU Assignment Submission
Last Date of Submission of IGNOU BCHCT-131 (BSCG) 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.

 

हाइड्रोजन परमाणु की त्रिज्या के लिए निम्नलिखित समीकरण को किस प्रकार प्राप्त किया जाता है?

equation

Ques 2.

हाइजेनबर्ग अनिश्चितता सिद्धांत की संक्षिप्त व्याख्या कीजिए।

Ques 3.

उन परिघटनाओं के नाम दीजिए जिनसे निम्नलिखित की व्याख्या होती हैः

(i) विकिरण की तरंग प्रकृति

(ii) विकिरण की प्रकृति 

Ques 4.

किसी कण के लिए काल-स्वतंत्र श्रोडिंगर समीकरण को प्राप्त कीजिए।

Ques 5.

श्रोडिंगर समीकरण के कार्तीय से गोलीय ध्रुवीय निर्देशांकों के रूपांतरण की व्याख्या कीजिए और उसका हल भी दीजिए।

Ques 6.

निम्नलिखित का इलेक्ट्रॉनिक विन्यास लिखिए।

Cl, Cr, Nb

Ques 7.

ऑफबाउ नियम लिखिए।

Ques 8.

दूसरे आवर्त के तत्वों की प्रथम आयनन ऊर्जाओं के मान लीथियम से बेरिलियम तक बढ़ते हैं, बोरॉन के लिए मान कम होते हैं, नाइट्रोजन तक फिर बढ़ते हैं, फिर ऑक्सीजन में कम होकर अंत में निऑन तक बढ़ते हैं। व्याख्या कीजिए।

Ques 9.

स्थिर, वैद्युत मॉडल के आधार पर और बॉन हाबर् चक्र से ZnO क्रिस्टल के लिए kJ mol' मात्रक में जालक ऊर्जा परिकलित कीजिए।

उपयोगी आंकड़ेंः

मैडैलुंग स्थिरांक (A) = 1.6411

बॉर्न स्थिरांक (n) = 8

अंतरानाभिक दूरी (a) = 199 pm

Zn(s) + ½ O2(g) → ZnO(s) equationH= - 350.5 kJ mol -1

Zn(s) → Zn(g) = 130.4 kJ mol -1

Zn(g) → Zn+(g) I(Zn) = 906.3 kJ mol -1

Zn+(s) → Zn2+(g) I(Zn+) = 1733 kJ mol -1

1/2 O2(g) →O(g) AH = 248.5 kJ mol -1

O(g) →0-(g) Ex(O) = 141 kJ mol -1

O-(g) →02-(g) EA(O-)=-780 kJ mol -1

Ques 10.

फॉर्मल आवेश को परिभाषित कीजिए। किसी अणु के फॉर्मल आवेश की गणना करने का

उद्देश्य बताइए और इसकी धारणाएँ लिखिए।

ii) NH3 और NH4के फॉर्मल आवेश का परिकलन कीजिए।

Ques 11.

VSEPR सिद्धांत का उपयोग करके XeF4 और PC15 की आण्विक ज्यामिति की प्रागुक्ति कीजिए।

Ques 12.

HCI की अनुनादी संरचनाएँ बनाइए। उनमें से कौन सा अनुनाद संरचना के रूप में कम महत्वपूर्ण है और क्यों?

Ques 13.

O+2 और 0-के लिए अणु कक्षक विन्यास लिखिए। उनके आबंध क्रमों का परिकलन कीजिए और उनकी चुंबकीय प्रकृति पर टिप्पणी कीजिए।

Ques 14.

अणु सूत्र C3H₁₂ वाले यौगिक के लिए श्रृंखला समावयव लिखिए।

Ques 15.

1,2-डाइमेथिलसाइक्लोप्रापेन के ज्यामितीय समावयव लिखिए। इनमें से किस समावयव का द्विध्रुव आघूर्ण होता है और क्यों?

Ques 16.

2,3,4-ट्राइहाइड्रॉक्सीब्यूटेनल के त्रिविम समावयवों के फिशर प्रक्षेप सूत्र लिखिए। इन समावयवों को ऐरिथ्रोस या थ्रिओस के रूप में वर्गीकृत कीजिए। उनके विन्यासों को D अथवा L के रूप में भी चिन्हित कीजिए।

Ques 17.

ब्यूटेन के विभिन्न कॉन्फॉर्मेशनों को आरेखित कीजिए और उनकी व्याख्या कीजिए। उनमें से कौन-सा सबसे कम स्थायी है और कौन-सा सबसे अधिक स्थायी है ?

Ques 18.

एथेनोएट आयन की अनुनाद संरचनाएं लिखिए। क्या ऋण आवेश स्थायीकृत है या नहीं?

Ques 19.

उचित उदाहरण देते हुए अतिसंयुग्मन की व्याख्या कीजिए।

Ques 20.

मुक्त मूलकों का स्थायित्व कार्बधनायनों के स्थायित्व से किस प्रकार समान होता है? उपयुक्त उदाहरणों द्वारा व्याख्या कीजिए।

Ques 21.

निम्नलिखित में से कौन-सा अधिक स्थायी है तथा क्यों?

Ques 22.

निम्नलिखित अभिक्रियाओं की संक्षिप्त व्याख्या कीजिए और महत्व बताइए।

(i) वुर्ट्स अभिक्रिया

(ii) सबात्ये-सेंडेरेन्स अभिक्रिया 

Ques 23.

उचित उदाहरण देते हुए बर्च अपचयन की क्रियाविधि की व्याख्या कीजिए।

Ques 24.

1-ब्यूटीन के जलयोजन की क्रियाविधि लिखिए।

Ques 25.

2-पेन्टाइन के ओजोनोलिसिस से प्राप्त उत्पाद लिखिए। इसमें होने वाली क्रियाविधि भी दीजिए।

Ques 26.

बेन्जीन के अणु कक्षकों को आरेखित कीजिए और उसका इलेक्ट्रॉनिक विन्यास दर्शाइए।

Ques 27.

How is the following expression for radius of hydrogen atom arrived at? 

 

Ques 28.

Briefly explain Heisenberg uncertainty principle.

Ques 29.

Name the phenomena which can be explained using

(i) wave nature of radiation

(ii) particle nature of radiation.

Ques 30.

Arrive at the time independent Schrodinger equation for a particle.

Ques 31.

Explain the transformation of Schrodinger equation from Cartesian to spherical polar coordinates and give its solution.

Ques 32.

Write the electronic configuration of the following:

Cl, Cr, Nb

Ques 33.

State aufbau principle.

Ques 34.

First ionisation energies of second period elements show that the values increase from lithium to beryllium, decrease for boron, and increase up to nitrogen, again decrease in oxygen and finally increase up to neon. Explain.

Ques 35.

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

Useful data:

Medelung constant (A) = 1.6411

Born Constant () = 8

Internuclear distance (a) = 199 pm

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

Zn(s) → Zn(g) H = 130.4 kJ mol-1

Zn(g) → Zn+ (g) I(Zn) = 906.3 kJ mol-1

Zn+(s)→Zn2+(g) I(Zn+) 1733 kJ mol-1

1/2 O2(g) → O-(g) H=248.5 kJ mol-1

O(g) →0-(g) EA(O) = 141 kJ mol-1

O-(g) →02-(g) EA(0-) = -780 kJ mol-

Ques 36.

Define formal charge. State the purpose of calculating formal charge of a molecule and write its assumptions.

Ques 37.

Calculate the formal charges of NH3 and NH4.

Ques 38.

Predict the molecular geometry of XeF4 and PCl5 molecules by using VSEPR theory.

Ques 39.

Draw the resonance structures of HCl. Out of them which one has little importance as a resonance structure and why?

Ques 40.

Draw the resonance structures of HCl. Out of them which one has little importance as a resonance structure and why?

Ques 41.

 

Write the chain isomers for a molecule having molecular formula C5H12-

Ques 42.

Write the geometrical isomers of 1,2-dimethylcyclopropane. Which one of them will have a dipole moment and why?

Ques 43.

Write the Fischer projections of stereoisomers of 2,3,4-trihydroxybutanal. Classify as them as erythrose or threose type. Also mark their configuration as D or L.

Ques 44.

Draw and explain various confirmations of butane. Which one of them is least stable and which one is the most stable?

Ques 45.

 

Write the resonance structures of ethanoate ion. Is the negative charge localised or not?

Ques 46.

Illustrate hyper conjugation with a suitable example.

Ques 47.

How does the stabilities of free radicals resemble those of carbocations? Explain with the help of suitable examples.

Ques 48.

Which out of the following pairs is more stable and why?

 

Ques 49.

Briefly explain the following reactions and give their importance;

(i) Wurtz reaction

(ii) Sabatier-Senderen’s reaction

Ques 50.

Explain the mechanism of Birch reduction giving a suitable example.

Ques 51.

Write the mechanism of hydration of 1-butene.

Ques 52.

Write the products formed when 2-pentyne undergoes ozonolysis. Give the mechanism involved.

Ques 53.

Draw the molecular orbitals of benzene and illustrate its electronic configuration.

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