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[TotalNo. of Printed Pages : 4

SS

2037

ANNUAL EXAMINAMON SYSTEM

CIIEMISTRY (Theory)

(Common for Science & Agriculture Groups)

(English Version)

(Evening Session)

Time allowed : Three hours Maximum marks : 70

Note : (i) You must write the subject code/paper code 053/C in the box provided on the title page of yottr answe:r-book.

(ii) Make sure that the answer-book contains 30 pages (including title page) and are properly serialed as soon os you receive it.

(iii) Question/s attempted after leruving blank page/s in the answer-book would not be evaluated.

' "'-

Ron No?.o [t.ES. 8.].1{5..

Total No. of Questions :261

(iv)

(v)

(vi)

(vii)

(viii)

(ix)

(x)

(xi)

053/C

1

[Turn over

Log table.s may be asked for if needed.

Use of simple calculator is allowed.

Marks allotted to each question are indicated against it. The paper comprises of 26 questions. Attempt total 26 questions. Internal choice is given in Q. No.lgr23r24r25 and26.

Questiott No.l to 8 carry one mark eaclt Answer in one line. Question No. 9 lg will be of nao marks each. All questions are compulsory. They are short answer

$jr'qurrtoni.

Question No. t7 to 23 wilt bb bf 4 nw,tr;A:btch,. All questions are compulsory. Internal choice is given for Q. No. 19 and 23.

Question No. 24,25 and 26 (Three questions),lilt b, of 6 marks each. All questions are compulsory. Full internal choice is given.

All que stions a.r e co mpuls ory.

t'UnO"r what conditions the van't Hoff factor is equal to one ? 053/C-SS

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(2)

.{ Definehalf life period of a reaction'

/r/*^tedownruPAc 0

4. Complete the following reaction :-

+ HzO SiOz

e<>

800K,,\,

5. Write down the chain Isomer of CH, -

CH, - CH., -CH3

d Write down name of one antibiotic'

$ *natareanslgesigs ?., .

f *aredowndifferences between thermosetting nglymes a'nd thermoplastic polymers.

.:

d5$Ip"ss coordination isomerism in [CO(NH3).] [Cr (CNU

'r/:

f4l Wfrat do you mean by inversion of cane sugar ? I

)d Write down Hinsberg's test forprimary rprimary amines. alrunes' I

16. Write down reaction involved in preparation of potassium permanganate ore.

053/C-SS

I

I

cl

6

e, -"-Wffit aremonosaccharides ?

)

;t'

n rolidhasNaClstructure.Iftheradius

ofcationAis l00pm,whatistheradiusof anior.B? 2

10. calculate the time required for the completion of 9a7o of a reaction of first order kinetics tYz=44.1 minutes.

what is magnetic separation method for concentration of ore ? 1

I

1

f'

2

2

2

2

from pyrolusite

2

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(3),fi The density ofchromium metal is 7 .Z,gcrn-3,If the unit cell is cubic with an edge length of 289 pm, determine the type of unit cell. (Atomic mass of chromiu m= 529 amu) y @ Prove that elevation in boiling point is a coiligative property.

*n The boiling point of benzene is 353.23K. When 1.8Og of a non.volatile solute was dissolved in 90'g of benzene, the boiling pointis raised to 354;1lK. Calculate the rnolar mass of solute. (\ for benzene

=

2.53KKgmel-t).

p.?a/hat is corrosion ? what are the factors affecting corrosion ? or

Write the Nernst equation and calculate the emf of following cell at 29BK:- Cu(s)/Cu2* (0.130M) ll Ag* (1.0x10aM) /Ag(s)

Given E" (Cu2*/ Cu) = + 0.34V

E'(Ag*/Ag)=+0.80V, why?

.d rndy naogens are coloured ?

22. (i) Why do ethers possess dipole moment ?

(i) Write Clemmensen reduction reaction

lffinte Rosenmund reacti on

-(iii) Formaldehyde gives Canrizzaroreaction whereas acetaldehyde does not. Why ? or

(i) Aldehydes and ketones undergo a number of nucleophilic addition reactions. Why ?

(ii) Acetic acid is liquid while aromatic acids are solids. Give reasons. 058/C-SS

I

2+2

4

4

ffi*rHe colloidalsolution. Differentiate between lyophillic colloids and lyophobic colloids. 4

21, (i) SQ act as both oxidising and reducing agent but HrS acts as only reducing agent. 2

z

2

(ii) Boiling points of ethers are lower than their corresponding isomeric dlcohols. Why ? 2 23.

1

1

2

2

2

[Turn over

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1

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I

I

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(4\

24. (i) Unlike Phosphorus, nitrogenshows,little tehdency for catenation. Why ?

(ii) S{ is known but SHu is not known. Explain'

(iii) Give hybridization and draw sfructure of XeF;' 2

2

",2

of

-/

f{g*ptain the steps involvedin,manufacture of sulphuric acidby contactprocess.

(ii) Write down the reaction of Ozone with Potlissium'iodide. t{O, u*structure of C/Fr.

25. (i) Why clo transition elements show catalytic properties ?

(ii) Calculate equivalent weight of KMnOo in neutral medium. hat is the cause of Lanthanoidcontraction ?

or

(i) ' Write clown any three iimilarities between lanthanoids and, actinoids..: i;

(ii) Oul of Co l* andZnz* which will be paramagnetic and why ? :

(iii) Drarv the structure of permanganate iorH

Write the following reactions :

Jf naV. S chierhann reac tion

.i

-::

r'ii€.i-1:'t i

Ja

2

1

2

2

2

3

2

.81.

26.

A{ 6

y Fittig's reaetion

Gattermann reaction

Finkelstein reaction

Diazotisation reaction

...,11

Grooves process.

1

1

1

1

1

1

(i; ""

The treatment of'alkylhalide with aqge&ls KOH leads to the formation of alcohols while inthepresence of'alcoholic"KoH; alkenes,a'reforr'ried as the majorprodlre'Explain. 3

(ii) How aryl halides react with sodium me,tal ?Explain why alkyl halides show nucleophilic substitution reaction ?

l

rl ii

:

l

:

;j

I

058/'c-ss

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