BSc Chemistry SEM II ATKT 2018-19 ATKT Chemistry II Question Paper - Mumbai University | munotes

Questions asked in this paper

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1. Q2 Answers to the same questions must be written together
2. Q3 Figures to the right indicate full marks
3. Q4 The use of log table/ non programmable calculator is allowed
4. Q1 (A) Select the correct option and complete the following 12 marks
5. Q1 _ 1s a weak electrolyte in an aqueous medium NaOH is aqueous medium ili) Wavenumber is directly proportional to of light Iv) are also called as super cooled liquids
   • v) angle X-P X in PX3 get reduced
   • a) with increase in electronegativity of halogen atom
   • b) with decrease in electronegativity of halogen atom
   • c) no effect of electronegativity of halogen atom A covalent bond is called coordinate bond when
   • a) both the bonded atom contribute one electron each
   • b) one of the two bonded atom contribute both the electrons
   • c) there is no sharing of electron pair between the combining
   • vii) The standard reduction potential of a Standard hydrogen vill) The strongest reducing agent in the electrochemical series
   • ix) Heat of hydrogenation of cyclohexene is
   • x) compound is __ stable as compared to
   • a) more equally
   • Q.P. Code: 51641
   • xi) the chair conformation of cyclohexane, all the carbon— hydrogen bonds on adjacent carbon
   • a) staggered c) none of these conformer is the most unstable conformation of
   • (B) State whether the following statements are False 3
6. Q1 With the increase in the concentration of an electrolyte in the Copper metal is extracted from molten matte through
   • (C) Match the following columns Acts as self indicator. | c Perchloric acid in volumetric analysis 5
7. Q2 (A) (i) What will be the pH of a solution obtained by mixing 800cm? of NaOH and 200 cm? of 0.1M HCI assuming complete dissociation of the acid and the base? 5 marks
   • (ii) Describe any two applications of common ion effect in the qualitative analysis of cations 3
   • Q.P. Code: 51641
   • (A) (i) a buffer solution? Explain the mechanism of the buffer action for an acidic buffer 5
   • (ii) Calculate the pH of a solution when 0.3g of NaOH is dissolved — in water to give 200 cm? of a solution (Molar mass of NaOH 3
   • (B) (i) Calculate the energy and frequency (in wave number) of red light having a wavelength of 680 nm. (c=3 m/s: h =6.626 5
   • (ii) Explain the plane of symmetry in a cubic crystal. 3
   • (B) (i) a) State law of Rational Indices. 2
   • b) Determine the Miller indices of the following Weiss Indices 3
   • (ii) quanta of energy. Give the electromagnetic spectrum in order of decreasing wavelength 3
   • (ii) Define a) Crystallography Space lattice 2
   • (C) Define a) Triprotic acid b) Degree of ionization. 2
   • (ii) State the law of Symmetry. How many elements of symmetry are there in a cubic crystal? 2
8. Q3 (A) Explain the Sidwick-Powell theory .On the basis of this theory; predict the shape of BF3 molecule 5 marks
   • (ii) Write a comprehensive note on ‘Fajans rule’. 3
   • (A) (i) Draw the Lewis dot structure of the following. 5
   • (ii) Explain the effect of lone pair of electrons in the geometry of molecule by giving suitable examples 3
   • (B) Balance the following equation with stepwise explanation using 5
   • Q.P. Code: 51641
   • (ii) |The standard electrode potential values of iron for the following — redox reactions are given below Construct the Latimer diagram and find out the and values for the reaction 3
   • (B) (i) a) Explain the titration curve of KMnQ, and 5
   • b) Calculate the for the titration of 50.0 cm? of solution against 0.02M at the equivalence point when the pH=1 at 298K
   • (ii) Find out the oxidation number of ‘P’ in the following. 3
   • a) b) Cc)
   • (C) (i) Differentiate between electrovalent bond and covalent bond 4
   • (C) (i) What are the limitations of VSEPR theory? 4
9. Q4 (A) Discuss the relative stabilities of cyclopropane and cyclobutane. 5 marks
   • (ii) Explain transannular strain. 3
   • (A) Draw the various conformers of cyclohexane and discuss their structures in detail 5
   • (ii) Discuss the aromaticity of pyrrole. 3
   • (B) State and explain Huckel’s rule with suitable examples. 5
   • (ii) . Explain the advantages of nitrating mixture. 3
   • (B) Explain the mechanism of sulphonation of benzene. 5
   • (ii) Discuss the flipping in cyclohexane. 3
   • Q.P. Code: 51641
   • (C) how Hammond’s postulate helps to identify the structure of transition state 4
   • (C) (i) With suitable examples give a comparative account of 4
10. Q5 Attempt any Four of the following
    • (A) Explain the concept of pH? Show the mathematical relationship — between pH and pOH 5
    • (B) 1) What is meant by quantisation of energy? Mention the three quantised energy levels possessed by (3) 2
    • (C) What is Frost diagram? Discuss Frost diagram for Manganese under basic conditions 5
    • (D) Explain the application of iodine as redox reagent. 5
    • (E) What is Friedel Crafts acylation reaction? Give its mechanism. 5
    • (F) 1) Give the following conversions 3
    • a) Benzene to Acetophenone
    • b) Benzene to Ethyl benzene
    • c) Benzene to Cumene 1i) Explain the function of FeCl; in Chlorination of Benzene. (2)

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