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    FYBSc Physical & Organic Chemistry

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    Manali Sawant
    This document contains a chemistry exam with questions on physical chemistry, organic chemistry, and chemical reactions. It includes 8 multiple choice questions and 6 long answer questions testing understanding of topics like: 1) Properties of matter, the first law of thermodynamics, acid-base equilibria, and Le Chatelier's principle. 2) Derivations of expressions related to pH, Kc, and the common ion effect. 3) Mechanisms and reactions involving substitution, reduction, rearrangement, and oxidation of organic compounds. 4) Identifying structures of compounds and predicting products of reactions based on given information. The exam aims to evaluate students' comprehension of important concepts and principles

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    FYBSc Physical & Organic Chemistry

    Uploaded by

    Manali Sawant
    635 views3 pages
    This document contains a chemistry exam with questions on physical chemistry, organic chemistry, and chemical reactions. It includes 8 multiple choice questions and 6 long answer questions testing understanding of topics like: 1) Properties of matter, the first law of thermodynamics, acid-base equilibria, and Le Chatelier's principle. 2) Derivations of expressions related to pH, Kc, and the common ion effect. 3) Mechanisms and reactions involving substitution, reduction, rearrangement, and oxidation of organic compounds. 4) Identifying structures of compounds and predicting products of reactions based on given information. The exam aims to evaluate students' comprehension of important concepts and principles

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    This document contains a chemistry exam with questions on physical chemistry, organic chemistry, and chemical reactions. It includes 8 multiple choice questions and 6 long answer questions testing understanding of topics like: 1) Properties of matter, the first law of thermodynamics, acid-base equilibria, and Le Chatelier's principle. 2) Derivations of expressions related to pH, Kc, and the common ion effect. 3) Mechanisms and reactions involving substitution, reduction, rearrangement, and oxidation of organic compounds. 4) Identifying structures of compounds and predicting products of reactions based on given information. The exam aims to evaluate students' comprehension of important concepts and principles

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    635 views3 pages

    FYBSc Physical & Organic Chemistry

    Uploaded by

    Manali Sawant
    This document contains a chemistry exam with questions on physical chemistry, organic chemistry, and chemical reactions. It includes 8 multiple choice questions and 6 long answer questions testing understanding of topics like: 1) Properties of matter, the first law of thermodynamics, acid-base equilibria, and Le Chatelier's principle. 2) Derivations of expressions related to pH, Kc, and the common ion effect. 3) Mechanisms and reactions involving substitution, reduction, rearrangement, and oxidation of organic compounds. 4) Identifying structures of compounds and predicting products of reactions based on given information. The exam aims to evaluate students' comprehension of important concepts and principles

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 3

    DCT’s

    Dhempe College of Arts & Science


    F.Y.B.Sc. Semester II Examination July 2021
    Chemistry: Physical Chemistry and Organic Chemistry
    Paper Code: CHC-102 (DSC 2B)

    Duration: Two Hours. Max. Marks: 40


    _____________________________________________________________________________
    Instructions: 1) All questions are compulsory although there is internal choice.
    2) Figures to the right indicate full marks.
    3) Use of calculator is allowed.

    Q1) Answer any five of the following: (5 x 2 = 10)


    i. What are extensive properties and intensive properties? Give two examples of each.
    ii. Write a short note on first law of thermodynamics.
    iii. Write the equation for degree of dissociation of weak acid. State 2 factors affecting the
    degree of dissociation.
    iv. State Le Chatelier’s principle. What is the effect of change in concentration of reactants
    on the following reaction.
    N2 + 3H2 2NH3
    v. a) Draw the structure of the product A obtained in case of the following reaction.

    b) Give the reaction to illustrate Cannizaro reaction of benzaldehyde.


    vi. Give the two different combinations of alkyl/aryl halide and alkyl/aryl oxide (with
    structures) used in preparation of anisole by Williamson’s synthesis. Also mention which
    combination is more preferred and why?
    vii. a) Complete the following reaction. Name the reaction.

    b) Toluene on treatment with strong oxidizing agent gives the product A. Write the
    reaction.
    viii. a) n-butylchloride on reaction with NaOH gives the product having stereochemical
    inversion in configuration. Write the reaction and also mention the path followed by the
    reaction.
    b) Arrange the following in the correct order of reactivity towards nucleophilic `
    substitution reaction.

    (1) (P.T.O)
    Q2) Answer any six of the following: (6 x 5 = 30)
    i. a) Define heat of combustion and heat of neutralization.
    b) The heat of combustion of ethylene at 17ºC and at constant volume is – 332.19 kcal.
    Calculate the heat of combustion at constant pressure considering water to be in liquid
    state. (R = 2 cal degree–1 mol–1).
    ii. Derive expression for pH of buffer solution for basic buffer. Calculate pH of the buffer
    solution if concentration of CH3COOH is 0.1M and CH3COONa is 0.15M.
    (Ka = 1.8×10-5)
    iii. Derive the relationship between Kc and Kp. Calculate Kc for the following reaction at
    673K : 2H2O(g) + 2Cl2(g)  4HCl(g) + O2(g)
    (Given Kp = 0.035; R = 8.314 J K–1 mol–1)
    iv. What is common ion effect? Explain giving suitable example. Derive the relationship
    between pKw, pOH & pH.
    v. a) A compound A with molecular formula C4H8O gives compound B on treatment with
    sodium borohydride. Compound B has molecular formula C4H10O, and it forms a cloudy
    solution only after heating with Lucas reagent. Compound A on treatment with ethyl
    magnesium bromide forms compound C, with molecular formula C6H14O which on
    treatment with Lucas reagent gives a cloudy solution after 5 minutes. Give the structures
    of compound A, B, & C.
    b) Give the reaction for Meerwein–Ponndorf–Verley reduction of butan-2-one.
    vi. a) Explain the mechanism for Pinacol-Pinacolone rearrangement with a suitable example.
    b) Give the reaction to illustrate Sandmeyer reaction for the preparation of
    chlorobenzene.
    vii. a) Complete the following reaction. Explain the mechanism for the following reaction.

    b) Give the method of preparation of benzene from acetylene.


    i. a) Give the mechanism involved in the following reaction.

    b) o-nitrochlorobenzene and p-nitrochlorobenzene are more reactive towards


    nucleophilic substitution reaction as compared to chlorobenzene. Give reason.

    ************THE END************

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