Gujarat University 2005 B.Sc Chemistry Third Year - exam paper

TB-02
Chemistry Paper-VIII

TB-02

Chemistry Paper-VIII

Seat No.

Time : 3 Hours]    [Total Marks: 70

: (!) HHL> ILmVu op $.

(2) tfHsO. HL> &lLcLc. Vja. VL-L-iL VL op -?lL=L .

1.    (=H) -tll-LL Jil I>1 L A 6tR CL"! :    (8)

(1)    ULtfVl (Spiran) %L4>hVLI JLL$L LLiarLL ll

(2)    *Lly. 2-l-L-Ll Pl-l (Br₂) y.L-Ml lLlc-l il['LL-Ll H.ll -Llwl silcl rL-LL L-Ll teMjRPl %L*l>lcCt.

(3)    PU dl[a[$L-LL OolliL LL-ll 3ML*l[J U[L %L*l>lcCt.

(4)    'h-U [-W.H S&LL LJl %L*l>lcLl.

(H) -Lll-lL Jl-Ml-U 6tR CL"! :    (6)

(1)    -LlL-lL Jlfi-ll %U*CRri SjklPLLL [Ll[cL[?l .Wld.

CiL[5L[-LLL LLljLlJlli%U.tf4.

WWi

(2)    -LlL-Ll JlfL-il PlLL, BLfiR =H-l LLCL[LrL GJLLlCaLrLL .Wic!

1-2 - JlCL

WWi )M-l Jl[LL

2.    (=H) -Lll-lL JLil aLl L A JlMl-LL 6tR CL"! :    (7)

(1)    W-JLl [Sl-LLJL-l JlCL-ll CⁱLL$llClLL JR -R -LLL L-Ll .Wic!

(2)    uiM *1-0. H.LLl&l21 JR -lTl CLMl.

(3)    SN¹ =H-l SN² JlCL-l ^cliL?L LLMSL ll.

(4)    Pl*l\il-2LtfCl R JR -iLU CL"il.

(H) -ill-LL JJil aLl l A Jt-il-lL 6tR CL"il :    (7)

(1)    l-ttLtf-l ['qjAPl 6L2L -lLl W-JLl    [ctt-LlU-l uCl-LL JLd ljjI.

(2)    o-ilHl .PteilCi =H-l m-<jlM .PteilCL aUlHLtfi %U.l HcmI 4.Hl[-W.L-ll lrIhL $al -Llw lJL . - y.wicii.

(3)    2, 4 - 4L*l-u6&l iseikM[-tt-l 130 *L LLUHL-l >rcLk Na2 CO₃ %Ul 2, 4 -iitfl [-iLci iJJ . - y.wicii.

-tll-LL M Ll L 6. &tR <H"lL :    (8)

(1)    iq.1 il i &L6L H a - p HlLYL HiR'ii y.Ul'-l .

(2)    a-i-OHlc-LHi H-l LtfiL&H<a (- OH)-. -LL-L HciL il

(3)    ilfti H[$LiL-ll is-i yMMM HLUl.

(4)    p-Mil-LHi. p-HLUl-il-1-LL HisHl-ll Ll CR il.

-ilil-LL M Ll L 6. UmViL GtR CL"il :    (6)

(1)    il i il-Ll-i a-uLuLtfei iflMil-i y.ul'-i .

(2)    [-Li\il-LHl Mil-l H-i UiUMil-l ciil-LL >\LL-LL -LL-L H\-LL LcU.

HLUl.

(3)    LPli Hfei-i    HLUl.

-ilil-LL M Ll L A UmViL &tR CL"il :    (10)

(1)    il i (+) CLiilHl 3.4C.L H-l Hl-lM'Ltfi HiHi ULl-tl il' tRiC. ri-LL iH-ll C.iil q - C₄ >\iU3l .

(2)    'Itt-L HHL3L    irll UfiUiHl HLUl.

(3)    HHiC-ll/iliil-i-l HHiL il.

-ilil-LL 4il Ll L A -Li LCLhL HLUl.    (4)

(1) cii-Ll-i (2) Lk (3) -LLM>ll-l

-ilil-LL 4il Ll L A UmViL &tR CL"il :    (5)

(1)    HtM.HL-i ciollii HLiil.

(2)    yMi HLUl. : Wlistf-L

(3)    yMl HLUl : LU(>L-lMH

-ilil-LL 4il oil L 6. UmVu &tR CL"il :    (5)

(1)    Cii .oii'l ir -tli ci"il.

(2)    yMMM HLUl : hM-L

(3)    yMMM HLUl : HR-L-i

-Llil-U 4il oil 6. HmVu StR CL"i\ :    (4)

(1)    L-lL?Li'l HiCl ?i ? OH-. ciolliL Hiiil.

(2)    LsgOhSL HLUl : DDT

(3)    LCLhL HLUl : HLC'il-l

[Total Marks : 70

Instructions : (1) All questions carry equal marks.

(2) Figures to the right indicate full marks to the sub questions.

I. (A) Answer any two of the following questions :

(1)    Discuss the optical isomerism of spiran compounds.

(2)    Indicate the products obtained by addition of bromine (Br₂) to cis 2-butene and explain its mechanism.

(3)    Explain the chemical method to separate the racemic Lactic acid.

(4)    Explain Crams rule with suitable illustration.

(B) Answer the following questions :    (6)

(1) Discuss the synthetic applications and mechanism of the following reagent :

Aluminium isopropoxide

OR

Osmium tetroxide.

(2) Discuss the principle, mechanism and synthetic applications of the

following reaction :

Arndt-Eistert reaction

OR

Hoffmann reaction.

2. (A) Answer any two of the following questions :

(2)    Both m-bromo anisole and o-bromo anisole give only one product with sodamide in presence of liquid ammonia. - Explain.

(3)    2, 4-dinitro chlorobenzene with aqueous Na₂CO₃ at 130C gives

2, 4-dinitro phenol - Explain.

3. (A) Answer any two of the following questions :

(1)    Prove that Citral is an a-P-unsaturated aldehyde compound.

(2)    Prove the position of double bond and hydroxyl group (-OH) in a-Terpineol.

(3)    Give synthesis of Camphor from Camphoric acid.

(4)    Prove the presence of two P-ionone units in P-carotene.

Answer any two of the following questions :

(1)    Prove that Coniine is a-propyl piperidine compound.

(2)    Give evidence for the attachment position between pyridine and pyrrolidine rings in Nicotine.

(3)    Give synthesis of Tropic acid.

4. (A) Answer any two of the following questions :

(1)    Prove that both the monosaccharide units present in (+) Lactose have pyranose ring and connected by C₁-C₄ linkage.

(2)    Give reactions which prove the structure of Sucrose.

(3)    Prove the structure of Amylopectin.

5. (A) Answer any two of the following questions :

(1)    Explain the classification of Drugs.

(2)    Give synthesis of : Benzocaine.

(3)    Give synthesis of : Trimethoprim.

(B)    Answer any two of the following questions :

(1)    Write a note on Vat dyes

(2)    Give synthesis of : Eosin

(3)    Give synthesis of : Alizarin.

(C)    Answer any two of the following questions :

(1)    What are pesticides ? Give their classification.

(2)    Give synthesis of : DDT

(3)    Give synthesis of : Aldrin.

(4)

TB-02    4

Attachment: gujarat-university-2005-b-sc-chemistry-33430-1.pdf

Earning:   Approval pending.