Sunday, November 29, 2015
S.B Roll No. _______
APPLIED
CHEMISTERY – II
2nd
Exam/Common/2254 May 2011
Duration: 3 Hours M. Marks: 75
Section
A
1)
1. Fill in the
blanks:
i) The naturally occurring compounds of metals
know as ________
ii) Slow and continuous decay of metal by
mechanical force is known as __________
iii) Protection
of Fe from corrosion by cementation of Cr, is known as _________
iv) Q
KJ heat is obtained by combustion of V m3 of gaseous fuel, its
calorific value
=
_________
v) Main
hydrocarbon constituents of biogas is_________
vi) The Government of India set up _______on 1st
March 2002 under the provision of
the Energy conversations Act, 2001.
vii) Cock number of lubricating oil is measure in
__________
viii) Suspension of graphite in water is called as
__________
ix) Pigments vanish is called __________
x) Silica (SiO2) bricks are used
in lining roof of __________
State following
statements is TRUE of FALSE:
xi) Chlorethense is the monomer of PVC .
xii) Natural rubber is an elastomer.
xiv) Earth’s most water is locked in the form of
ice at north and south poles.
xv) PCBS (Polychlorinated biphenyls) used as
fluid in transformation and capacitors are
less carcinogenic pollutes.
Section
B
Answer
any FIVE of the following:
2. a). Define
smelling of concentrated ore.
b). Give the composition, one important
properly an application of Nichrome.
3. a). Can
we store copper sulphate solution in iron container? Give reason in either case (use standard electrode
potentials of Fe and Cu -0.44V respectively).
b). Write Dulong’s formula with
usual notations and calculate higher calorific value (HCV) of the coal sample containing 86% of C,
10% Hand 4% Kilocalories per kilograms.
4. a). In
a Proximate analysis coal two grams of coal sample is heated to 105oC,
for half an hour cooled and weighted is found to weight 1.95 then if further
heated to 925oC with covered lib in muffle fumance for five minutes,
then cooled found to weight 1.85g. The residue is heated strongly to obtain ash
0.100g, calculate percentage of moisture, volatile matter and ash content in
the coal sample.
b) What
is power alcohol?
5. a). Define
fire point, viscosity and viscosity index (VI), pour point and cloud point of
oil.
b). what
is an enamel? Write constituents and applications of enamels.
6. a). What
are semiconductors? How are these classified? Give an example and applications of
each type.
b). Explain condensation polymerization using
nylon as an example.
7. a). Define
homopolymer and copolymer with suitable
as an explain.
b). Give
three main cause of water pollution.
Section
C
Answer any THREE of the following:
8. a). What
are the applications of geosythetic and ceramic materials?
b). Explain
rusting of iron using electrochemical theory (When cathodic area> anodic area)
9. a). What
is cetane number? How chemical structure of fuel the cetane number?
b). Explain
total acidity, cock an aniline number of a lubricant.
10. a). Describe
with neat diagram the sacrificial anodic protection of base metal iron from corrosion.
b). Differentiate
between thermoplastics and thermosetting plastics.
11. a). Explain
Free energy change and Ellingham diagram their usefulness and in metallurgy.
b). What
are the characteristics of a good fuel?
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