(Following Paper ID and Roll hlo. to be filled in your Answer Books) RolINo,
B.TECH. Theory Examination (Semester-If) 20L S*ld ENGIhIE ERING CIIEMIS TRY Time : 3 llours
Mox Morks: I0(l SectioD-A
Q.l Attempt aII parts. AII parts carry equal marks. Write anslver of each part is Short. (2x10:20) a.
Boiling Point of water (HrO) is higher than that of by dragen Fluoride (IIF). Explain why.
b.
Define the Synnnetry elements
ofa
cr1atal. Explain the lathice
plane and the unit cell in sodium chloride crystals. aa
tv.
Accowrt for the fine structure in H-NMR Spectrum of C-H protons in ethanol (CH, C[{, OH). Itlafiral Rubher needs uruleanizations. Give Roa.sons.
Differentiate betrreen addition po$merization and condensation polymerization with suitable exanqlle. State the significance ofTriple point.
IR speahs is often ctraracteresis as molecular frrger prints Comnrent on it.
tr
Wtry is calgon conditions beuer ttran phoqphate conditioning?
i
IVhat is meaut by calorific value of a fuel?
j.
\Mrite short note on biorniass.
Sectior-B
Q.2 Attempt
a.
any five parts from the following (10x5:50)
The density of Nacl is 2.163 glcc.Calculate the edge of its cubie cell, assuming that four molecules ofNacl are associated per rHrit cell.
b.
Calculate the firass of air needed for complete combustion
of
5.0 kg of coal containing SA% carbon l5% hydrogen and rest
oxygeL c.
Erylain the corrosion phenonrenou invohing oxide fikn growth
la\il.
s
0\
d.
What are copolynrers? How does Buna-s differs from Buna-
N? EI
W.
How do you prepare the fotlowing polymers (i) Bakelite (il) Nylon-6 (iii) Nylon66 (rD Dacron, A water sample contains the following inputities Cf:2Qpprn, Mg'*:l8ppm, Heo3- - 183ppm and SO42-: 24 ppm. Calculate the amount,of lime,add soda needed for softening.
(i) (0
/
S*' lead by racemic mixture. Where as S*2 gives rise to inverted product. Optical isonrerism of lactic acid.
Define infrared spectroscopf Describe the various molecular vibrations in the technique.
Sectiotr-C
Q.3 Attempt
(a)
any two questions from this bection (15x2:30) What are the fullerenes? Discuss their properties and llses.
(b)
Calculate the bond order
of\-,
CO, NO, and Or*
Q.4
(a)
How is the calorific value of a solid fuel determiile using bomb calorimetes experiments?
(b)
Why is it conventional of express hardness of water
in terrns of CaCo, at the international level? Wiite other rurits also. 5.
(a)
What are coffosion untribitor? Explain with exanples how anodic ard cathodb intribitor provide protection against corrosion.
o)
Sanple ofcoal contains
C43%,lIdo/a
and astr196.
The following data was obtained when the above coal was tested in bornb calorimeter,
(D Wt. of coal burnF0.92 g (0 Wt ofwater taken:2200g. (O
Water equivalent ofbomb calorinretes:550g
(iv)
Rise in
(v)
Fuse wire correction
terrperature-z.42[.
= 10.0 cal
(vD Acid correction = 50.0
cal.
Calculate gross and net calorific value of the coal assuuring the latent heat of condensation of steam as
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