Veer Narmad South Gujarat University 2011-1st Year B.Sc Chemistry SB-0607 - 2 - Question Paper

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C₂H_i0-¹C₃H_rpN-IC₃H₆0₃ [A]    [B]    [C]

ENGLISH VERSION

Instructions : (1) As per the instruction no.l of page no. 1.

(2)    All subquestions of question no. 1 are compulsory.

(3)    Give equations and figures wherever necessary.

(4)    Figures to the right indicate full marks of the question.

(5)    (H=l, C=12, N=14, 0=16, S=32, Cl=35.5, Ag=108, Pt=195).

(vii)    Give reaction of anthracene with acidic dichromate.

(viii)    Give Baeyer's test with an illustration.

(ix)    "At ordinary temperature oils are liquid whereas fats are solid." Why ?

(x)    Which type of carbohydrate is cellulose ? Why ?

(xi)    Give reaction of toluene with chlorine in the presence of halogen carrier.

(xii)    Give full form and formula of DDT.

(xiii)    if ammonia gas is obtained when an organic compound is heated with alkali which group can be detected in the compound ? Give an illustration.

(xiv)    Give reaction of acetone with iodine in the presence of alkali.

(xv)    From among CN~, NO, FeCl and    which reagents are nucleophilic reagents ?

2 (a) Describe explosion method for determining molecular 4 formula of Gaseou's Hydrocarbons.

OR

(a)    0.183 g of a monobasic acid requires 15 ml of    4 N/qNciOH solution for neutralisation. Calculate the

molecular weight of the acid.

(b)    What is geometrical isomerism ? Explain geometrical 4 isomerism in maleic acid and fumaric acid.

OR

(b)    Explain enantiomorphs, racemates and meso compounds 4 with illustration.

(c)    Write E-Z configuration of the following compounds : 3

(i)    l-chloro_2-bromo ethylene

(ii)    3-methyl-2-hexene

(iii)    2-iodo-3-methyl-2-pentenoic acid.

(a) Explain mechanism of Cannizero's reaction.

OR

(a) Explain with suitable illustration the mechanism of reaction between asymmetric alkene and asymmetric reagent.

(b) Giving the importance of concentrate4 iⁿ    4

nitralion of benzene, describe the mechanism of the reaction.

OR

(b)    What is inductive effect ? Explain +1 and -I effect 4 with suitable examples.

(c)    (i) Write IUPAC names of the following compounds. 3

(i)    CH., -CH-CH₂- CH₂ - CH., ch₂ CH., (ii)    CH., - C- CH₂ - CH- C₂H₅

O    OH

(ii) Write structural formula of the following compound :

2, 4 dioxohexanoic acid.

(a) Write method of preparation of cycloalkane from    4

disodio malonate. Give substitution reaction of cylopentane with bromine.

OR

(a)    "The lower homologues of cycloalkanes easily give    4 addition reactions while in higher homologues addition reactions generally do not take place." Justify the statement.

(b)    Which compound will be obtained when a mixture of 4 acetylene and hydrogen cyanide is passed over a hot tube at high temperature ? Give an equation of the reaction and sulphonation and reduction reactions of

the compound.

OR

(b)    Which compound will be obtained when a mixture of 4 normal butane and sulphur is heated at high temperature ? Give an equation of the reaction and Friedel Craft and nitration reactions of the compound.

(c)    Give Haworth's synthesis of phenanthrene.    3

(a) Give any two methods of preparation of 1, 3    4

butadiene. Give reactions of 1, 3 dutadiene with hydrogen and HBr.

OR

Explain dehydrohalogenation of alkyl halide with    4

suitable illustration.

Determine the presence and position of Ketone group 4 in the structure of fructose.

OR

Give reaction of glucose and fructose with excess of 4 phenyl hydrazine.

Describe with calculation the method of determining 3 saponification value of glycerides.

Give method of preparation of benzene from phenol. 4 Give addition reactions of benzene.

OR

With reference to benzene nucleus give two    4

illustrations each of activating and deactivating primary substituents. What role does the presence of there primary substituents play in benzene nucleus ?

Write any one method of preparation and two    4

chemical properties of resorcinol.

OR

Write method of preparation and uses of anthranilic 4 acid.

Give names and structural formulae of [A], [B] and 3 [C] in the following reaction :

C₂H_i0-^llC₃H_rpN-IC₃H₆0₃ [A]    [B]    [C]

SB-0607]    7    [ 3800 ]

1

(vi)    At which position do the electrophilic reactions take place in furan ? Why ?