Calcutta University Question Paper
Are you trying to find Calcutta University Question Paper in PDF? then you are on the genuine website to get question paper you want.
We have share everything associated with the Calcutta university exam here.
The suggestions are also uploaded here along with the question. The question of the past several years is available here. Read the post properly so that you can get all the information about Calcutta University Question Pattern. Here this is the Sample Question paper of all CU question paper. The question of the past many years is offered here. It will surely assist you to know the question pattern of upcoming Examinations. We have only one objective to post so that students can get all the right information. The only objective to publish the question paper on this blog is to help the students of General & Honours courses of all semester and exams to understand the question format. Here you can download original question paper in PDF. Download the question in PDF and take a print out. Best of luck!
Name of the Examination : Calcutta University Examination
Paper: Honours (CC-3)
Year : 2021
Full Marks: 50
Subject : Chemistry (H) [Organic Chemistry - 2]
Category : Calcutta University Question Paper
Calcutta University Chemistry Honours Paper
T(2nd Sm.)-Chemistry-H/CC-3/CBCS
2021
CHEMISTRY — HONOURS
Paper : CC-3
[Organic Chemistry - 2]
Full Marks : 50
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
Answer question no. 1 (compulsory) and any eight questions from the rest (question nos. 2 to 13)
1. Answer any ten questions : 1×10
(i) Which one of the following undergoes silver ion assisted hydrolysis? Give reason.
(j) Draw the structure of the most stable conformer in Newman formula for FCH2CH2F.
(k) Which one is the better substrate for SN1 reaction of the following compounds? Give reason.
(l) Identify the most acidic proton and explain your choice.
2. (a) Designate R/S in the following compound showing the priority of ligands.
(b) The rotational energy barriers in CH3CH2 X (X = F, Cl, Br, I) are remarkably similar in magnitude (around 14-15 kJ/mol) despite considerable difference in the size of halogens. How do you explain for the fact? 3+2
3. (a) Predict the products in the following reactions with mechanism. Offer explanation.
(b) Arrange three classes of aliphatic amines in increasing order of basicity in polar protic medium with explanation. 3+2
4. (a) Give an example of a molecule with enantiomorphic groups along with pro-R and pro-S hydrogen atoms on a pro-pseudoasymmetric centre.
(b) Between p-chlorophenol and p-fluorophenol which one is a stronger acid and why? 3+2
5. (a) Consider the following reaction sequence:
Draw an energy profile diagram indicating transition states and rate determining step.
(b) Draw the structure (showing stereochemistry) of the product formed when CN𝝧 attacks from the Re-face of acetaldehyde. Determine the absolute configuration of the product. 3+2
6. (a) Draw the staggered conformation of 1-chlorobutane for rotation about C-1/C-2 bond and also about C-2/C-3 bond. Comment on the relative stabilities of the conformers.
(b) Compare the ease of racemisation of the following compounds with proper justification. 3+2
7. (a) Identify the underlined atoms and groups as homotopic, enantiotopic or diastereotopic with explanation.
(b) Using elimination reaction as a tool, identify the following isomeric compounds. 3+2
8. (a) The K1/K2 ratio of fumaric acid is 23·17, while the value for maleic acid becomes 20·168. How would you explain this observation?
(b) SN2 reaction always leads to inversion of absolute configuration.
Justify/Criticise the statement. 3+2
9. (a) Optically pure PhCH(Me)Cl shows 98% racemisation while C6H13CH(Me)Cl shows only 34% racemisation when treated with water : acetone (1:4) solvent. Explain the observation.
(b) Arrange the following compounds in order of increasing acidity.
Calcutta University Chemistry Honours Paper
Give explanation in favour of your answer. 3+2
10. (a) The following reaction normally does not take place. What you should add to the reaction mixture to make it a feasible one? Explain your answer.
(b) When benzenethiol is first treated with an excess of sodium ethoxide followed by 1, 2–dibromoethane, the main product is phenylthioethene. Explain this reaction with plausible mechanism. 3+2
11. (a) Relative rate constants for solvolysis of three bromoalkanes in 60% EtOH–H2O and in H2O are as follows:
(i) Explain why 2–bromo–2–methylpropane undergoes solvolysis more than 104 times faster than bromoethane and 2–bromopropane in both solvents.
(ii) Explain why the relative solvolytic reactivity of 2–bromopropane is significantly larger in H2O than in 60% EtOH – H2O as solvent.
Calcutta University Chemistry Honours Paper download
(b) Suggest mechanisms for the following elimination reactions. Why does the first reaction yield a mixture of products but the second one gives a single product?
12. (a) Bromination of isobutane (Br2/127oC, light) gives 1% isobutyl bromide and 99% t-butyl bromide but chlorination of isobutane (Cl2/25oC, light) gives 67% isobutyl chloride and 33% t-butyl chloride.
Explain the above observation.
(b) Compare the basicities of 2, 6–ditertiarybutylpyridine and pyridine in aqueous medium. 3+2
13. (a) CH3CH(OH)CH2SEt and CH3CH(SEt)CH2OH gives the same product when treated with dry HCl.
Give the structure of the product and explain its formation.
(b) When n-butyl bromide is treated with NaI in ethanol, the concentration of iodide ion decreases quickly but then slowly returns to its original concentration. Identify the major product of this reaction with explanation. 3+2
Download PDF Link Below👇
Calcutta University Question Paper 2021:
The University of Calcutta takes the entrance exam for selecting candidates. But now days CU published merit list according to obtain marks in previous exam. If any college takes entrance exam in order to admission then students should practice his/her subjects from previous year question paper as our website uploaded several years of question paper you will find in “page” name “CU” in our website. Therefore, all the students must download the Calcutta University Question Paper in PDF from this website or you can download question paper from official website of CU. Previous year question paper will help you to know the pattern of Calcutta university question paper. It can surely help you that what type of question can come in the admission test of CU or other exam like sem ester examination in CU. Therefore, it is very important for all the students to download.
Download Calcutta University Question Papers Last 10 Years in PDF.
Last 10 years Question Paper will help you to prepare for your upcoming Calcutta university examinations. You can download all subjects question paper for general and honours courses here. All papers coded like GE, CC-I, CC-II all these types of question paper you can download from this website as we upload all papers.
You can also download Old Question Papers of Semester Exams will help you to prepare the important topics which are recurrent in the exams. Therefore, in this content, we are giving full description on Calcutta University Question paper.
Question Papers of Calcutta University
The interested candidates who want to study any course from the university must fill the Calcutta University Application Form 2021. However, the admission for Graduate (Honours and General), Postgraduate and Ph.D. courses is on the basis on written entrance exam. So, the candidates should practice well for the entrance examination by solving Calcutta University MA Entrance Exam Question Papers in order to score good marks in the exam. Therefore, in this content, we are giving all important details regarding the Calcutta University Model Papers and general instructions for the candidates. So, it will surely help the students to get good marks in exam as well as in semester exam.
Therefore , interested candidates who want to download the question paper of Calcutta university all categories examination can download question paper easily by just clicking on “CLICK HERE” text which is given below. Apart from all question papers you will get sample papers for practice.
How to Download Question Papers of Calcutta University 2021?
It is very easy to get question paper of Calcutta university all examination. You can download all courses question paper Calcutta University BA(General & Hons)/B.Sc (General & Hons)/B.Com (General & Hons)/MA/Msc/M.Com
Entrance Model Papers are available in PDF format. Therefore, the candidates can download the previous year question papers and last 10 years question paper of various courses here or from the official website of the university. However, if you want to get good marks in exam then you should start focus on previous year question paper and start solving each paper of subject by himself/herself. Because these question papers are really beneficial for the students to know the actual pattern of the question paper and the important topics for the examination. Also, the candidates can download the Calcutta University Question Papers from the official website of the university.
If you to download Question Paper of Calcutta University from official website of Calcutta University you need to follow these steps given below
How To Download Calcutta University Question Paper :
· At First you have to visit the official website of Calcutta University and click on the section of “Students Corner”
· Then search for the Entrance exam and semester wise question papers you want along with the subject.
· After that click on the link , you are able to download the question papers.
· So, in the next step, you will find the link on the same page to download the question paper official site of Calcutta University.
· Click on the download link and wait for while and find out the document
· Finally, the candidates can access the question papers from their documents. Moreover, they should practice those question paper in order to secure a good rank in the examination.
Model test papers or previous year question paper are very important for those students who are currently a part of university. As they get lots of information about the pattern and get full knowledge of question paper pattern. However, students who are in part of any course in college which is under Calcutta University will get all pattern regarding question paper of CU.
So, if a candidate prepares himself/herself carefully through practicing model test papers and previous year question papers, then his/her chances of getting good marks increases. Therefore question papers are meant to make the candidates aware of the exam pattern for their upcoming examination. It is also increases the knowledge of time according to question numbers. Therefore, the students need to pay a full attention to solve the previous year question papers for the entrance exam.
Download question Paper in PDF Click Here
If you regularly solving the previous year question or model question paper, it will surely enhance your confidence level.
Therefore, the aspirants need to manage the time while practicing for the exam. Also, Time Management helps in scoring more marks and ultimately securing a good rank in the merit list. Therefore, the candidates must prepare by solving the Calcutta University Question Papers before appearing for the main exam.
Therefore , if you follow this steps of study move carefully or gradually it will sure help you to get secure marks in entrance exam as well as semester exams.
 2021 | Honours | 2nd Semester |Chemistry Honours Paper | T(2nd Sm.)-Chemistry -H/CC-3/CBCS | BSc Question paper | 2021 Question PDF Download | C.U. Question Paper | Calcutta University|){kind=link}
0 Comments
If you have any doubts, Please let me know.