IGNOU CHE 5 SOLVED ASSIGNMENT
CHE 5: Organic Chemistry
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| Title Name | IGNOU CHE 5 SOLVED ASSIGNMENT |
|---|---|
| Type | Soft Copy (E-Assignment) .pdf |
| University | IGNOU |
| Degree | BACHELOR DEGREE PROGRAMMES |
| Course Code | BSC |
| Course Name | Bachelor in Science |
| Subject Code | CHE 5 |
| Subject Name | Organic Chemistry |
| Year | 2025 |
| Session | - |
| Language | English Medium |
| Assignment Code | CHE 5/Assignment-1/2025 |
| Product Description | Assignment of BSC (Bachelor in Science) 2025. Latest CHE 05 2025 Solved Assignment Solutions |
| Last Date of IGNOU Assignment Submission | Last Date of Submission of IGNOU BEGC-131 (BAG) 2025-26 Assignment is for January 2026 Session: 30th September, 2026 (for December 2025 Term End Exam). Semester Wise January 2025 Session: 30th March, 2026 (for June 2026 Term End Exam). July 2025 Session: 30th September, 2025 (for December 2025 Term End Exam). |
| Format | Ready-to-Print PDF (.soft copy) |
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CHE 5 2025 - English
Tutor Marked Assignment
CHE-05: Organic Chemistry
Course Code: CHE-05
Assignment Code: CHE-05/TMA/2025
Maximum Marks: 100
Note: * This assignment is based on all the four Blocks of the entire course. * All questions are compulsory. Marks for the questions are shown within brackets on the right hand side. * Please answer in your own words; do not copy from the course material.
1. (a) Give the IUPAC names of the following compounds:
(b) Give the structure of the following compounds:
(i) 1, 3-Cyclohexadiene
(ii) N-methylcyclohexanamine
2. Draw various stereoisomers of 2, 3-pentanediol and classify them as enantiomers or disastereomers.
3. Draw the potential energy diagram for the conformations of n-butane. Compare the stabilities of the important conformations.
4. Differentiate between intermolecular and intramolecular hydrogen bonding giving suitable examples.
5. Arrange the following in the increasing order of their acid strengths:
Chloroethanoic acid, fluoroethanoic acid, propanoic acid.
Give reason in support of your answer.
6. (a) How can cyclopentane be prepared from hexanedioic acid ?
(b) How would you prepare alkanes from the following? (Give only one example).
(i) Alkyl halide
(ii) Carboxylic acid
(c) Explain the following:
(i) In the mass spectra, alkanes give a series of peaks separated by 14 mass units.
ii) Alkanes with odd number of carbon atoms have lower melting points than those with an even number of carbon atoms.
7. (a) Addition reactions of alkenes are exothermic processes. Explain.
(b) An alkene having molecular formula C6H12 an ozonolysis yielded butanal and ethanal. What is the structural formula of alkene
(c) Complete the following reactions:
(i) CH3CH2CH2BH2
(ii) (CH3)2C=O + Ph3P = CH2
8. (a) Arrange the following bases in increasing order of basic strength and give reason for your answer.
(b) How would you prepare the following?
(i) 3-Octyne from 1-hexyne
(ii) cis-3-Hexene from 3-hexyne
9. (a) Why does nitrobenzene not undergo Friedel-Crafts alkylation?
(b) What do you understand by para-directing activators, para-directing deactivators and meta-directing deactivators?
(c) What is Huckel’s rule? Which of the following compound(s) is aromatic? Justify your answer.
(i) Cycloctatatraene
(ii) Nitrobenzene
10. (a) Predict the major and minor products of the following reactions:
(i) Friedel-Crafts acylation of pyrrole
(ii) Friedel-Crafts alkylation of pyridine
(b) Write the structure of 3-methyl-1,3-thiozol.
(c) Explain the following:
(i) 2-Position in furan is more reactive than the 3-position towards electrophilic substitution
(ii) Pyrrole is more basic than pyridine.
11. Among alkyl halides, order of reactivity of SN2 reaction is
CH3X > p-RX > Sec-RX > tert-RX
Discuss the factors which are mainly responsible for this order.
12. Write the chemical equation for following named reactions:
a) Reimer-Tiemann reaction
b) Kolbe reaction
c) Claisen reaction
d) Knoevenagel reaction
e) Willgerodt reaction
13. Suggest the reaction that can best be used to prepare following ethers by Williamson ether synthesis
(a) CH3CH2- O- CH= CH2
(b)
14. Write the mechanism for the haloform reaction.
15. Explain Hell-Vollhard-Zelinski reaction. Also illustrate its synthetic importance.
16. Write chemical reactions for the following:
(i) Kolbe Schmidt reaction
(ii) Strecker synthesis
(iii) Dieckmann cobndensation
(iv) Knoevenagel reaction
(v) Perkin condensation
17. Discuss various methods of reduction of esters giving the products formed.
18. (a) Why do nitro compounds dissolve in sodium hydroxide?
(b) What is aci form of nitroethane? Discuss.
19. Match the following ions with their correct pKa values and give reasons for your answer
20. What are nucleotides? Draw the structures of nucleotides present in DNA and give their names.
CHE 5 2025 - Hindi
शिक्षक जांच सत्रीय कार्य
कार्बनिक रसायन
रसायन विज्ञान में ऐच्छिक पाठ्यक्रम
पाठ्यक्रम कोड: CHE-05
सत्रीय कार्य कोड: CHE-05/TMA/2025
अधिकतम अंकः 100
नोट: सभी प्रश्नों के उत्तर दीजिए। प्रश्नों के अंक दायीं ओर कोष्ठक में दिए गए हैं।
1. (क) निम्नलिखित यौगिकों के आई.यू.पी.ए.सी. नाम दीजिएः
(ख) निम्नलिखित यौगिकों की संरचनाएँ दीजिएः
(1) 1, 3- साइक्लोहैक्साडाइईन
(ii) N- मेथिलसाइक्लो हैक्सेनैमीन
2. 2, 3-पेन्टेनडाइऑल के विभिन्न त्रिविम समावयव आरेखित कीजिए और उन्हें ऐनैन्टिओमरों और डाइस्टीरियोमरों में वर्गीकृत कीजिए।
3. -ब्यूटेन के कॉन्फॉर्मेशनों के लिए स्थितिज ऊर्जा आरेख बनाइए। महत्वपूर्ण कॉन्फॉर्मेशनों के स्थायित्वों की तुलना कीजिए।
4. उचित उदाहरण देते हुए अंतःअणुक और अंतरा अणुक हाइड्रोजन आबंधन में अंतर कीजिए।
5.(5) निम्नलिखित को उनकी अम्ल प्रबलता के बढ़ते क्रम में व्यवस्थित कीजिए:
क्लोरोएथेनोइक अम्ल, फ्लुओरोएथेनोइक अम्ल, प्रोपेनाइक अम्ल
6.अपने उत्तर के लिए कारण भी बताइए।
(क) साइक्लोपेन्टेन को हेक्सेनडाइओइक अम्ल से किस प्रकार बनाया जा सकता है?
(ख) आप निम्नलिखित से ऐल्केन किस प्रकार बनाएंगे?
(i) ऐल्किल हैलाइड
(ii) कार्बोक्सिलिक अम्ल
(ग) निम्नलिखित की व्याख्या कीजिए :
(i) द्रव्यमान स्पेक्ट्रम में ऐल्केन 14 द्रव्यमान इकाइयों द्वारा पृथकित शिखरों की श्रेणी प्रदर्शित करती हैं।
(ii) कार्बन परमाणुओं की विषम संख्या वाली ऐल्केनों के गलनांक सम संख्या वाली ऐल्केनों के गलनांकों की तुलना में कम होते हैं।
7.
(क) एक ऐल्कीनों की संकलन अभिक्रियाएं उष्माक्षेपी होती हैं। व्याख्या कीजिए।
(ख) एक ऐल्कीन जिसका अणु सूत्र C6H12 है, ओज़ोनोलिसिस करने पर ब्यूटेनैल और एथैनैल देती है। इस ऐल्कीन का संरचना सूत्र क्या है?
(ग) निम्नलिखित अभिक्रियाओं को पूरा कीजिए:
(i) CH3CH2CH2BH2 CH3COOH
ii) (CH3)2C=O + Ph3P = CH2 CH3CH=CH-CHO
8.(क) निम्नलिखित कारकों को उनकी क्षारीय प्रबलता के बढ़ते क्रम में व्यवस्थित कीजिए और अपने उत्तर के लिए कारण बताइए।
(ख) आप निम्नलिखित को किस प्रकार बनाएंगे?
(i) 1-हैक्साइन से 3-ऑक्टाइन
(ii) 3-हैक्साइन से सिस 3-हैक्सीन
9.
(क) नाइट्रोबेन्ज़ीन का फ्रीड्ल क्राफ्ट्स ऐल्किलीकरण क्यों नहीं होता है?
(ख) आप पैरा-निदेशात्मक सक्रियक, पैरा-निदेशात्मक निष्क्रियक और मेटा-निदेशात्मक निष्क्रियक से क्या समझते हैं?
(ग) हकल नियम क्या होता है? निम्नलिखित में से कौन-सा यौगिक ऐरोमैटिक है?
अपने उत्तर की पुष्टि कीजिए।
(i) साइक्लोऑक्टाटेट्राईन
(ii) नाइट्रोबेन्ज़ीन
10.(क) निम्नलिखित अभिक्रियाओं के मुख्य और अल्प उत्पाद बताइएः
(i) पिरोल का फ्रीडेल-क्राफ्ट्स ऐसिलीकरण
(ii) पिरीडीन का फ्रीडेल- क्राफ्ट्स ऐल्किलीकरण
(ख) 3-मेथिल-1, 3-थायाज़ोल की संरचना लिखिए।
(ग) निम्नलिखित की व्याख्या कीजिए :
(i) इलेक्ट्रॉन स्नेही प्रतिस्थापन के प्रति फ्यूरेन की 2-स्थिति 3-स्थिति से अधिक अभिक्रियाशील होती है।
(ii) पिरोल पिरीडीन से अधिक क्षारीय है।
11. एल्किल हैलाइडों में SN2 अभिक्रिया की अभिक्रियाशीलता की दर का क्रम निम्न प्रकार से है
CH3X > प्राथमिक RX > द्वितीयक RX > तृतीयक RX अभिक्रियाशीलता इस क्रम के कारकों की व्याख्या कीजिए।
12. निम्नलिखित अभिक्रियाओं के लिए रासायनिक समीकरण लिखिए।
क) राइमर टीमन अभिक्रिया
ख) कोल्बे अभिक्रिया
ग) क्लेजन अभिक्रिया
घ) नोवेनेजेल अभिक्रिया
ङ) विल्जेरोट अभिक्रिया
13. विलियम्सन ईथर संष्लेषण द्वारा निम्नलिखित ईथरों को बनाने के लिए सर्वोत्तम अभिकर्मक सुझाइएः
क) CH3CH2-O-CH=CH2
14. हैलाफॉर्म अभिक्रिया की क्रियाविधि लिखिए।
15. हेल-फोलॉर्ड-जेलिस्की अभिक्रिया की व्याख्या कीजिए। इसके सांश्लेषिक महत्व को भी दर्शाइए।
16. निम्नलिखित रासायनिक अभिक्रियाओं को लिखिएः
17. एस्टरों के अपचयन की विभिन्न विधियों की प्राप्त उत्पादों को बताते हुए चर्चा कीजिए।
18.(क) नाइट्रो यौगिक सोडियम हाइड्रॉक्साइड में क्यों विलेय होते हैं?
(ख) नाइट्रोएथेन का ऐसि रूप क्या है? इसकी प्रकृति की चर्चा कीजिए।
20.न्यूक्लिओटाइड क्या होते हैं? डी.एन.ए. में उपस्थित न्यूक्लिओटाइडों के नाम और संरचनाएं दीजिए।
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