Gujarat University 2005 B.Sc Chemistry Third Year - - VIII - Question Paper

Seat No.

TB-02

Chemistry Paper-VIII Time : 3 Hours]    [Total Marks: 70

: (!) HHO HMh.1 op iRHl $.

(2)    Hl> -iRci h tel HMdl l op -lR $.

1.    (=H) -tll-LL ii. I} l l    6tR CL"! :    (8)

(1)    iLL.-L (Spiran) illl>-Ll-ll ilL$L ilLierLL l!

(2)    illiL 2-l-l-Ll M-l (Br₂) iLL-l-ll LlL$Lll ilCLL-Ll H.cLl -Lll>'l &$llc|l rL-LL L-Ll [&uRPt iLWLc{l.

(3)    tlPli l&eiliLd-U HCLaOjrtSL LL-ll    U[rl iLWLql.

(4)    'H-il [-W.H lM S&LL Lift iLWLcil.

(H) -tll-LL HMl-lL 6tR CL"il :    (6)

(1)    -LlL-ll ILC Li -Ll ilLMfod GiWlPldl ['uRPl lil iLWLcil.

C[5l[-LL LtfilMuliiLLd.

WWi [LH eUitLd

(2)    -LM-ll LL-il [il Ld, ['LLftPt -t ilLMfad SiMlPLdL iLWLc{l.

L-e - tfiee VlfiLL

WWi 'll-l il[LL

2.    (=H) -tll-LL ilil LL l l H-LL-ll 6tR CL"! :    (7)

(1)    W-LLl [cli-lLil-l il[L-ll ['LLSUCLdL iR -LrLL iL-ll =Hi3.

iLWLc{l.

(2)    udM il-ll llLI&l21 iR -lTl cl"LL.

(3)    SN¹ -l SN² [LL-t .ctiLL U3L ll.

(4)    [-Lit-eLCL =Hi3. iR -ilH Cl"il.

(H) -tll-LL ilil Lt l l H-il-LL 6tR CL"ll :    (7)

(1)    .-Ltf-l ['Ll[ct[t 6L2L -Lcll W-tLl Rl*L[i [cti-LLil-l il['LLLL iLd LUl.

(2)    o-LLLL [-LiLlCL -l m-<ilM [-LillCl illdLHLtfd iLL-l HcmI il[-lLL-Ll LilHl Sid -ilW . - ilL>'Lctl.

(3)    2, 4 - dLL-LLe'l KHkMi-tt-l 130 il dLUHL-l >TClk Na2 CO₃ iLL-l 2, 4 dLL-lLtfeL [-LlCi lil . - iLWLci\.

-M-U A li i I H-ll-U 6tL Ci*ii i    (8)

(1)    iL i [lM H a - H'lrlVl Hlfil&S li>H .

(2)    a-2HClHl H-i LLICL (- OH)-. -LL-L LcLL. il.

(S) i*i.[i HRuhL-LI i-j Msl Hiui..

(4)    p-l-l*i. -HlLi-il-t-tl i HiHi-l ll Ll. ii.

-M-U li. t i l H-1-U 6tL Ci"ii :    (6)

(1)    .cil ii i il-il-i a-UiUltfCL iMlil-. li>H .

(2)    [-Lii.l-tH Mil-t H-i UlL-Cilil-i qVu >Uii3i-u -ii-i HVil licil HlU..

(5)    aiii H[li-i MmM HlU..

-M-U 4il li i l H-1-U tL Ci"i :    (10)

(1)    cLl \ i (+) CiilH Cii i-i i-ti.'.lti HiHl UlH 3lA Ull rl-il riH-l .=4 C_j - C₄ >\ill .

(2)    il HUlSl .L iril UfLH. HlU..

(S) HnitfciRil-t-j iii.i i.cii i\.

-M-U 4il li i l -il CLiM HlU..    (4)

(l) q.i-k (2) iLlci (S) iiMik

-M-U 4il li i l H-1-U t Ci"i :    (S)

(1)    hIhUL-L .ilil HlU..

(2)    lMiM HlU.. : i-Utf-t

(S) lMMM HlU. : L.(>L-Mh

-M-U 4il li i l H-1-U tI Ci"i :    (S)

(1)    L LiV U -llH C-LMi.

(2)    lMMM HlU. : tfHM-t

(S)    lMMM HlU. : H[l1-1.

-M-U 4il li l H-1-U tL Ci"i :    (4)

(1)    rl-illi'i HCL . ? LH-, .Llil HlU..

(2)    ICLhL HlUi : DDT

(S)    ICLHL HlU. : HlC'il-i

[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-33436-1.pdf

Earning:   Approval pending.