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

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1. Q3 The use of log-table/nonprogrammable calculator is allowed
2. Q4 Answers for the same question as far as possible should be written Select the correct option and complete the following sentences: 12
   • (i) In Electrolytic cell, oxidation reaction takes place Gi) is an equimolar mixture of
   • (a) quinine and hydroquinone, (b) quinone and hydroquinone,
   • (c) quinone and hydroquinine
   • (iii) A piece of molten ice is placed in a beaker covered with a glass, the number of phases present. are
   • (iv) For a one phase and one component system, the degrees of freedom are equal to
   • (v) Cobalt forms colour bead in borax bead test
   • (vi) is an ore of
   • a) Cd b) Ti c) V
   • (vii) The coordination no of Cr [Cr (C2 is (Vill) among the following complexes is an outer orbital
   • (ix) Which of the following is the strongest acid? The name of this reaction is
   • (c) Claisen Condensation (x1) Methyl benzene on oxidation using Alkaline gives ED29AE1247B4DC6F8A832BE3E8664BA5 (xii) Which is the weakest of these acids? B State whether the following sentences are True or False 03
   • (i) The Gibbs phase rule is applicable to homogeneous equilibrium does not obey the effective atomic number rule
   • (iii) Carbon dioxide on treatment with Grignard’s reagent forms an C Match the following 05
3. Q3 TiCls c) Zero degree of freedom
4. Q5 Reaction between sodium — e) d’sp* hybridisation benzoate and ethyl bromide
   • f) reducing agent
   • h) oxidising agent
5. Q2 Ai) Derive Nernst equation for the determination of an emf of a cell. il) The basic reaction which takes place in a standard Weston Cell is 03 The emf cell is 1:018V at 298K. Its temperature coefficient at constant pressure is -3-88 x Calculate AG, AS and AH for the given cell reaction of Weston Cell Explain electrolyte concentration cell without transference reversible 05 to cation with a suitable example 5 marks
   • ii) To recover silver from its solution, construct an appropriate galvanic 03 cell with the help of the given half cells and write down the reaction which takes place at respective electrodes involved in it — State the phase rule and explain the meaning of the terms involved in 05 ED29AE1247B4DC6F8A832BE3E8664BA5 il) The boiling point of benzene at 352.2K is 1.013 x the boiling point of benzene at 0.53 x N The molar heat of vaporization of benzene at its boiling point is 31.8 kJ B 1) State and explain the condensed phase rule. 05 il) At 373.6 K and 372.6 K vapour pressures of water are 03 1.018 x N 0.978 x N Calculate molar heat of vaporization of water. (R= mol! ) C Define anode and cathode electrode. Which sign (positive or negative) 04 would be assigned to anode and cathode in galvanic cell and in
6. Q3 A i) Name the elements of the first transition series and give their electronic li) With the help of suitable examples, explain the rules applied to name 03 the central metal ion in complexes A i) Explain the isomerism exhibited by the following complexes. 05 5 marks
   • ii) Explain why Sc** salts are stable. 03 B 1) Salts of most of the transition elements are colored. Explain with 05 li) Write a note on the industrial applications of coordination complexes. 03 B i) [Ni (CN)a]* is diamagnetic while [Ni(Cl)4]* is paramagnetic. Explain 05 on the basis of VBT C What is the role of in volumetric analysis? 04 C Explain EAN rule with any two examples. 04
7. Q4 A i) Give an account on ‘Claisen Condensation reaction’ and give its il) Give any one method of preparation of 03 ED29AE1247B4DC6F8A832BE3E8664BA5 A i) How will you convert: (Give reactions only) 05 5 marks
   • b) Phthalic anhydride from phthalic acid
   • c) ethanoic acid from Ethanol
   • d) benzene from benzoic acid
   • e) propanoic acid from 1-propanol il) What is ‘nucleophilic acyl substitution’? Explain its mechanism with 03 an appropriate example in acidic medium B 1) Predict the products obtained on sulphonation of the following — 05 (Give reactions only)
   • a)toluene
   • b)phenol
   • c)nitrobenzene
   • d)naphthalene il) Give any one method to synthesize the following with the help of 03
   • a) acetamide
   • b) methyl acetate
   • c) acetyl chloride B i) Complete the following reactions:- 05 li) What is IPSO substitution? How is picric acid prepared from phenol 03 by IPSO method? Give reactions Ci) How will you convert the following (Give reactions only) 02
   • a) acid to ethyl propanoate
   • b) succinic acid to succinic anhydride
   • c) salicylic acid to methyl salicylate
   • d) phenyl cyanide to benzoic acid
   • e) salicylic acid to acetyl salicylic acid
   • ii) Explain the acidity of benzoic acid .Why is salicylic acid more acidic 02 than benzoic acid C i) Complete the following reaction. Give its name. 02 li) Justify both the statements :- 02
   • a) Formic acid is a stronger acid than acetic acid
   • b) Sulphonation of naphthalene gives a-isomer at 80 and B-isomer
8. Q5 Attempt any Four of the following A Write a note on calomel electrode. 05 B Give a brief account of metastable equilibrium in sulphur system. 05 C Write a brief note on physical properties and applications of vanadium 05 D Explain the different types of magnetic behavior exhibited by first 05 series of transitional elements E What are sulphonic acids? How will you convert benzene to benzene 05 sulphonic acid? Explain with mechanism F Explain reaction, give its mechanism. 05

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