Calcutta University Question Paper
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Name of the Examination : Calcutta University Examination
Paper: Firdt Paper/ Group B
Year : 2021
Full Marks: 50
Subject : Chemistry (H)
Category : Calcutta University Question Paper
Calcutta University Chemistry Honours Paper
T(I)-Chemistry-H-1B
2021
CHEMISTRY — HONOURS
First Paper
(Group - B)
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.
CHT-13a
Unit - I
Answer any three questions.
1. (a) The number of gas molecules of mass ‘m’ with speed between C and C + dC is given by
dN=AC2 e (-mc2/2kT) dC
Calculate the value of ‘A’.
How does the above distribution vary with temperature?
2. (a) Write down the Maxwell distribution for molecular speed of gases in three dimensions and describe the features using graphical plot.
(b) Use the Maxwell’s distribution of molecular speed to estimate the fraction of N2 molecules at 500 K that have speeds in the range of 290–300 ms–1. 3+2
3. (a) The virial equation of state in terms of P is given by (neglecting terms of higher order
Set up an expression for the initial slope of ‘Z’ versus ‘P’ curve of a real gas and obtain an expression for the Boyle temperature of the gas.
(b) Apply the equipartition principle to calculate γ=Cp/Cv for N2O assuming it to be ideal. 3+2
4. (a) Derive the reduced equation of state for ‘n’ moles of a real gas obeying the van der Waals equation.
(b) Consider the following equation of state for a gas :
5. (a) What is Lennard–Jones 6-12 potential? Draw the Lennard–Jones potential against the internuclear distance plot.
(b) At normal temperature, iodine is a solid but fluorine is a gas. Explain. 3+2
Unit - II
Answer any two questions.
6. (a) Identify the extensive and intensive properties among the following :
free energy, molar entropy, heat capacity, pressure.
(b) Calculate Q, W, ∆E and ∆H when one mole of ideal gas is reversibly expanded from 10 atm pressure and 2 lit to 5 atm isothermally at 27oC. 2+3
7. (a) Show that
(b) Calculate the enthalpy of formation of NH3, given the enthalpy of combustion of NH3 and H2 are – 90.6 kcal mol–1 and – 68.3 kcal mol–1 respectively. 2+3
8. (a) Derive the integrated form of Kirchhoff’s equation to show the variation of ∆Ho of a reaction with temperature. Under what condition this variation becomes independent of temperature?
(b) The heat capacity of a substance is often given by :
Use this expression to estimate the change in molar enthalpy of carbon dioxide when heated from 20oC to 40oC
Given : a = 44·22 JK–1 mol–1, b = 8·79×10–3 JK–2 mol–1, C = – 8·02×105 JK mol–1. 3+2
CHT-13b
Unit - I
Answer any three questions.
9. (a) State the two important deductions of Carnot’s theorem.
(b) Prove both the deductions qualitatively. 2+3
10. (a) State the two famous statements of second law of thermodynamics by naming them properly.
(b) Show that both the statements are equivalent. 2+3
11. (a) What is Clausius Inequality?
(b) A certain mass of ideal gas expands into vacuum to twice its initial volume. Calculate ∆U and ∆S of the process. 2+3
12. (a) Using Maxwell’s relations derive the equation of state :
(b) Define Joule–Thomson effect and Inversion temperature. 2+3
13. (a) Differentiate between Joule–Thomson cooling and adiabatic cooling.
(b) Draw S-T diagram of a Carnot cycle labelling the diagram, mentioning properly all the processes involved. 2+3
Unit - II
Answer any two questions.
14. (a) The half-life period of a first-order reaction is 15 min. Calculate the rate constant and time taken to complete 80% of the reaction.
(b) What is a pseudo first-order reaction? Explain with an appropriate example. 2+3
15. (a) What is homogeneous catalysis? Explain with a suitable example.
(b) Rate constants of a reaction at 300 K and 310 K are 4·5×10–5 sec–1 and 9·0×10–5 sec–1 respectively.
Evaluate the activation energy and pre-exponential factor of the reaction. What should be the order of this reaction? 2+3
16. (a) Calculate the activation energy of a reaction, whose rate constant gets tripled by a rise of temperature from 22oC to 32oC.
(b) Derive the Michaelis–Menten equation for enzyme catalysis explaining all the terms involved.2+3
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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.
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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.
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If you regularly solving the previous year question or model question paper, it will surely enhance your confidence level.
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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.
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