Download AKTU B-Tech 2nd Sem 2015-16 AS 203 Engineering Chemistry Question Paper

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 AS 203 Engineering Chemistry Question Paper

? " Printed Pages: 4 W ' AS-203
(Following Paper ID and Roll No. to be ?lled in your
Answer Books)
Roll No.
B.TECH.
Theory Examination (Semester?II) 2015-16
ENGINEERING CHEMISTRY
T ime : 3 Hours ? Max. Mar : 100
Section-A
Q.l Attempt all parts. All parts carry equal marks.
(2x 10_=20)
a. On the basis of MOT, prove that the molecule of oxygen is
paramagnetic in nature.
b. Describe the isomerism exhibited by maleic and ?lmaric acids.
0. What is chemical shift? Explain.
(1. De?ne the terms chromosphere and auxochrome in UV
shectroscopy.
1 (1) P.T.O.

What is indu?tiygeffect? Give any two examples where?this
effect is Operative.
Explain why benzyl carbonium ion is more stable than ethyl
carbonium ion is more stable than ethyl carbonium ion.
De?ne reverse ormosis and calgon conditioning.
What are disadvantages of scale formation?
How will you synthesise or/on ?om acetylene?
Differentiate between addition holymerisation and condensa-
tion holymerisation with suitable examples.
Section?B
2. Attempt any ?ve parts from this section. (10X5=50)
With the help of molecular orbital diagram, calculate the bond
order of the following:-
He2+, 022', NO, HF and N22'
Discuss in detail the case of an organic compound with two
chiral centres.
(2) P.T.O.

_. e What is Beer Lambert law in UV-VIEIEIBi?orption shectroscopy?
A compound having concentration 10'3 gll resulted abserbance
value 0.20 at the kmax 510 nm using 1.0 cm. cell. Calculate
its abrorhtivity and molar abserptivity values. Molecular weight
of compound is 400/200.
(1. Give the mechanism of SN1 and SN? organic reaction.
e. Describe ion-exchange process of softening of water.
f Write note no:-
(i) Reverse ormosis
(i1) Boiler corrosion
g, Describe the process of galvanization of iron. How does it
prevent the corrosion of iron?
h What is ziegler-Natta catalyst-? What is its signi?cance in
polymerization.
Section-C
Attempt any two questions from this section. (15X2=30)
Q.3 (a) What are carrosion inhibitar? Explain with examples how
anodic and cathodic inhibitar provide protection against
carrosion.
(3) P.T.O.

Q4
Q5
(b)
(a)
(i)
(il)
(b)
(i)
(ii)
(ii1)
(3)
Why is it Convenient to express hardness of ?W?ft?f in
terms of CaCO3 at the international level? Write other
units also.
Di?erentiate between
Enantiomers and diastereomers
Recemic mixture and Merocempounds
Write the preharation properties and uses of:-
Silicone rubber
PMMA
Bakelite ?
Discuss the principle and application of NMR spectros-
copy in structure determination of organic compounds.
(b) Derive the rate expression for second order reaction,
when the rectants are different.
(4) P.T.O.