Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU)) B-Tech 2nd Semester (Second Semester) 2015-16 202EAS Engineering Chemistry Question Paper
(Following Paper ID and Roll No. to be ?lled in your
Answer Books)
RollNoJ l llll I
B. TECH.
Theory Examination (Semesten-II) 2015-16
ENGINEERING CHEMISTRY
Time : 3 Hours Max. Marks .? 100
Section-A
Q.l Attempt all parts. All parts carry equal marks. Write
ansWer of each part is Short. (ZXIO=20)
a Boiling Point of water (HZO) is higher than that of by dmgen
Fluoride (HF). Explain why.
b. De?nethe Symmetryelements ofacrystal. Explainthe lathioe
plane and the unit cell in sodium chloride crystals.
c. Account for the ?ne structure in H-NMR Spectrum of OH
protons in ethanol (CH3 CH2 OH).
(1. Natural Rubber needs wuleanizations. Give Reasons.
(1) P.T.O.
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Differentiate between addition polymerization and condensa?
tion polyxm?zation with suitable example.
E State the signi?cance of Triple point.
g IR spmhs is often characteresis as molecular ?nger prints Com-
ment on it.
h Why is calgon conditions better than phosphate conditioning?
i What is meant by calori?c value of a ?lel?
j. Write short note on biomass.
Section-B
Q.2 Attempt any ?ve parts from the following (10X5=50)
a. The density 6fNacl is 2.163 g/cc. Calculate the edge of its
cubic cell, assuming that four mobcules of Nacl are associated
per unit cell.
b. Calculate the mass of air needed for complete combustion of
5.0 kg of coal containing 80% carbon 15% hydrogen and rest
oxygen
0. Explain the corrosion phenomenon involving oxide ?lm growth
law.
_ (2)
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What are copolymers? How does Buna-s di??ers from Buna-
N?
How do you prepare the following polymers
(i) Bakelite (ii) Nylon-6 (iii) Nylon66 (iv) Dacron.
A water sample contains the following inputities Ca?=20ppm,
Mg2+=18ppm, Heo3? = 183ppm and 8042? = 24 ppm.
Calculate the amount of lime and soda needed for softening.
(1) SN1 lead by racemic mixture. Where as 8; gives rise to
inverted product.
(i1) Opticai isomerism of lactic acid.
De?ne in?'ared spectroscopy} Describe the various molecular
vibrations in the technique.
Section-C
Q.3 Attempt any two questions from this section (15X2=30)
(a) What are the fullerenes? Discuss their properties and
uses.
(b) Calculate the bond order 931312 , CO, NO, and 02".
(3) P.T.O.
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Q-4 (a)
(b)
(b)
(c)
How is the calori?c value of a solid ?lel determine
using bomb calorimetes experiments?
Why is it conventional of express hardness of water
in terms of CaCo3 at the international level? Write
other unit: also.
What are corrosion tmhibitor? Explain with examples
how anodic and cathodic inhibitor provide protection
against corrosion.
Sample of coal contains C=93%, H=6% and ash=l%.
The following data was obtained when the above
coal was tested in bomb calorimeter.
(1) Wt. of coal burnt=0.92 g
(11) Wt of water taken=2200g.
(ih) Water equivalent of bomb calorimetes=550g
(iv) Rise in temperaturFZ.42?C
(v) Fuse wire correction = 10.0 cal
(v1) Acid correction = 50.0 cal.
Calculate gross and net calori?c value of the coal,
assuming the latent heat ofcondensation ofsteam as
580 callg.
Explain Zeolite process of water so?ering.
(4)
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This post was last modified on 29 January 2020