West Bengal Institute of Technology (WBIT) 2007 B.Tech Electronics and Communications Engineering Engineering Chemistry - Question Paper

Engineering Chemistry

CROUP-A (Multiple Choice Type Questions)

^{,1M,,aI dnd} fi'ial states of the system hwu t> the irreversibility in _{Ihe pr}<*sf    

^{d) thf in}'^,iai ate of (he system

ii) JNie JouJe-Thomson expansion is a) isobasfc

c) isothermal    ^f>)

d> iseothalpic

KiHn normal hydrogen decode, the activity ₀f * _{fo h}

c) 2    ^b> -²

<1) I

c) CH₄    ^{h) H}-

d) BoJ',

concentration. 0!- ** ^direCtlV    to the

a)zero

C) two    ^{h) ,me}

d) three

A conducting polymer _is a) polyclhvieae polyaniliue    ^,J) fb'Propylene

d) ftakcifte

vii)    The highest ranking coal is

a) anthracite    _{b> bU(lnlinous}

^c)liS^ni,    h) peat

viii)    Which f the following    i_s true always for _a spontaneous change at temperatures?

a) AH > 0 and AS < 0    l>) AH < 0 and AS < 0

c) AH < 0 and AS > 0    d) AH > 0 and AS > 0

ix) If the rate of a reaction becomes twice for every I0 rise in temperature

then what factor the rate of the reaction increases when temperature is raised troin 30C to 80C

^a),(i    b) 32

^{c) 64} d) 128

x) NMR spectra arc normally earned out on a) liquids or solutions    fc) _gases

^c)solfds    d) suspensions

XI) The calorific value should be the highest for

*) water gas    _{(|) LpG}

c) producer gas    _{d)    water}

xii) Most commonly used vulcanising agent is

^a)graP^hite    b) sulphur

O lampblack    d)oftoap

croup-is

(Short Answer Type Questions*

Answer any three ueslioas*

2. Stole and explain the first lav- of thermodynamics, induce t.V expression

for the maximum w.rk done who., an idcaJ gas exjnds i.>oir.rn_!aHv and revcrsiMy.

.5. <    5.he principle of Ihra-vioiei -spccfriiKt'op* in determining ihr

iOMiujtU,:; ,tf iu* organic omnpouiid. Wri*c d*n the matlicniuiieal form ₅rf ^{T    w}'**w :md explain each Urm.

^POj-^{VmerisaW    is lh}<    of

^e m<i use ^f N> Joo-66 and PVC.

5 !Vri.ice the egression for the rate constant of a second order reaction nhere the initial cmicenlrations f the two reactants art same.

*>. Disc.isy jihout SN^l atjd SS" rvactiow with examples*

il.onji Ansir type Questions;

Arjswe* ai;y };>'>/( cjueMin.s.

7. ! HhulM* the products amiable from the distillation of _cnidt. ,*tn, against the rau_RC of lco.pcnrt_BI. Define oclam- _ad cetane number ntat is

8. Sta'e and eplain the basic feature of IEfi ur-fi ;. tempcruiiire

carbonisation of coah Write ,in- usefuhstLVi of boil; (he proccsse*. 2 Mine cirr:vs

iinci nvf CLfiOi'Te value of Turf. hai aiv proAimate nd *,tl!*niaro nujvsi.-. u-coal?

Kxplain    _aad ,_{1Mld5Walion iwi>flICfiBtt}. _wi(h

u..    in of its _{stemlsrrf formt}.

semicoI.dJ.U'" ^{d,,TereD het}"^<:!n PlypV uctor ._nd

c Uhat is the * linger Prim Region in IK-specfroseopv?

10. a) Draw the ttuiductoirietrie titralsun curve for the tilratioj* of HO NaOH, explain the salient features ii> the curv<\

hi Define specific conductaiu-c and vqulvaieut conductance. Shosv how chev are related.

W sutc and explain Hess *i_f!i cxnpfe.

"^V'^,iii?^{r> l!<,ii}'^S '^{,n S(i}' ^lhl -    .u!i_wi7lfc.

i)> > Wfr siu-t _ufe.;_{(> a r&i}.._(jwi

...hh*-,,,hm _|aal;₁₁ ;,ir , tv,, _!f5i;n,_l51 ,_vs.,_;n

V }    L¹ 'I    *>**        r

   s nht;

Irr/icritas

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