Download AKTU B-Tech 1st Sem 2017-2018 RAS 102 Engg. Chemistry Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU)) B-Tech 1st Semester (First Semester) 2017-2018 RAS 102 Engg. Chemistry Question Paper

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B TECH (REGULAR+CARRYOVER)
(SEM 1) THEORY EXAMINATION 2017 -18
ENGG. CHEMISTRY
Time: 3 Hours Total Marks: 70
Note: 1. Attempt all Sections. If any missing data is required, then choose suitably.
SECTION- A
1. Attempt all questions in brief. 2 x 7 = 14
Explain when will the value of GCV=NCV?
b. The standard reduction potential of three metallic cations X,Y,Z are 0.52,?3.03 and -
1.18 V respectively, arrange them in decreasing order of their reducing power.
c. Write any two application of nanotechnology.
d. Arrange the following in the increasing order of their bond energy 02, 022+, 022'.
e. 100 ml of water sample has hardness equivalent to 12.5 ml of 0.08 N MgSO4 solutions.
Calculate the hardness of this water sample.
f. Will you prefer to polymerize acrylonitrile under anionic 0r cationic conditions?
Explain.
g. How many NMR signals will be obtained for Mesitylene?
SECTION- B
2. Attempt any three of the following: 7 x 3 = 21
a. Draw the Molecular orbital diagram of N2 molecule. Calculate its bond order and
predict its magnetic behavior.
b. Differentiate between (i) Thermoplastic and Thermosetting (ii) Addition and
condensation polymerization.
c. Describe the construction and working of Galvanic cell. Calculate the EMF of the
following cell and also write the cell reactions.
Zn | Zn2+ (0.001M) || Ag+ (0.1M) IAg
The standard potential of Ag/Ag+ half?cell is +0.80 V and Zn/Zn2+ is -0.76V.
d. Explain the basic principle of lime?soda process. Calculate the amount of lime and soda
required for softening 30000 liters of water, using 20 ppm of sodium aluminate as
coagulant. Impurities in water are as follows: Ca2+ =l60 ppm, Mg2+ = 96 ppm, dissolved
C02 = 34 ppm and HCO3' = 403 ppm.
e. What is the basic principle of Bomb calorimeter? A 0.80 g sample of solid fuel was
completely combusted in the excess of oxygen using bomb calorimeter. The rise in
temperature of water in calorimeter was 25?C. Calculate the High calorific value of the

b)
fuel. If water taken in calorimeter is 2000 g and water equivalent of calorimeter is 2200
g. Also calculate 10w Calorific value. (Given : % Hydrogen in fuel :22)
SECTION- C
Attempt any one part of the following: 7 x 1 = 7
Explain the structure, properties and applications of graphite.
What are liquid crystals? Differentiate between N ematic and semactic liquid crystal?
Write two applications of liquid crystals.
Attempt any one part of the following: 7 x 1 = 7
What are organometallic compounds? Write their classification, preparation and
applications.
Write the preparation, properties and applications of: (1) Nylon ?6 (ii) Bakelite.
Attempt any one part of the following: 7 x 1 = 7
What is Portland cement? Write the reactions involved in setting and hardening of
cement.
What are lubricants? Explain the theories of lubrication.
Attempt any one part of the following: 7 x 1 = 7
Define Phase rule. Apply phase rule to water system
Describe Zeolite process of water softening. A zeolite softener was 90% exhausted by
removing the hardness completely when 10,000 litres of hard water was passed through
it. The exhausted zeolite bed required 200 litres of 3% sodium chloride solution for its
complete regeneration. Calculate the hardness of water sample.
Attempt any one part of the following: 7 x 1 = 7
What is rank of coal? Describe proximate and ultimate analysis Of coal.
1. Explain shielding and deschielding in NMR spectroscopy.
ii. An aromatic compound (Molecular mass=135) give the following signals in N MR
Spectrum.
(i) Singlet (2.09 8),3H (ii)A distorted singlet (3.09 5),1H
(iii)A multiplet(7.27 5),3H (iV)A multiplet (7.75 5),2H.
Predict the structure of the compound.