Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU)) B-Tech 1st Semester (First Semester) 2018-2019 Chemistry Question Paper
pape'rm? mum 11 i? i l i 1 I
B TECH
(SEM 1) THEORY EXAMINATION 2018-19
CHEMISTRY
Time: 3 Hours Total Marks: 100
Note: 1. Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
l. Attempt all questions in brief. 2 x 10 = 20
3). Which of the following molecules will show rotational spectmm: Hz, HCl, CH4,
CH3C1, CHzClz, H20 and SB?
b). What is meant by the term polarizability in Raman spectra?
c). Explain why the value of GCV is greater thanNCV.
d). Why does magnesium bicarbonate require double amount of lime for softening?
e) . Write the monomer of a) Neoprene b) Terylene.
I). Whv adry ether solvent important for the preparation of Grignard reagent?
g) Comment on the use of aluminum in place of Zinc fog; 1 odic protection of iron from
rusting v.
h) Calculate the cell potential at 298 k for the re ?an
AP? + Fe ?1 Al + Fe? E0 cell=? 1.61. ?1??
The commutation of Al3+ and Fe 3" a1m?$h1d 2.5 Mi
i) Write any two applications of Nano??cmblogy w
j). Arrange the following molecules 1119115 1n order of their increasing bond lem-N2, N2',
N2 2'. > a
2. Attempt any three 31% following: 1. 10 x 3 = 30
a) Discuss the stIucture ,?preparation, properties and applicatiq?gs? of fullerenes?
b) Derive Nemst Equation. The voltage of the cell Pb/PhQQ?QazSOJI?Ig is 0 9647 V at
25?C the temperature is l. 74 x 10?1 VK'.Ca1culate,??w?fues of AG. AS and AH.
c) What is ?nger print region and functional gm , egion in IR spectroscopy71Two
isomers A and B of the molecular formula Cam?gives IR absorption at 1650 cm' and
1710 cm respectively. Assign structural forumla to A and B isomers?
d) What is hardness of water? What do )1011 111ean by term permutit? Describe Zeolite or
Permutit process for so?ening of hagl?wmer
e) What are organometallic compounds? Explain various methods of preparation of
Grignard reagent and also 11:111E reactions of Grignard reagent with HCHO RzNH,
C02, (?113(11on and ester," ?
SECTION C
3. Attempt any one part of the following: 10 x l = 10
(a) What are liquid crystals? Distinguish between Nematic 8.: Smectic liquid crystal
and write the applications of liquid crystal?
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(b)
(a)
(b)
(a)
(b)
(a)
(b)
(a)
(b)
Explain BMO and ABMO and di?erentiate between them. Draw molecular orbital
diagram of NO?. Calculate its bond order and predict its magnetic properties.
Attempt any one part of the following: 10 x 1 = 10
State the selection rule for Raman spectroscopy. What technological advances have
enabled the routine use of Raman spectroscopy? Which of the following rpectroscopy
(IR or Raman) would you use to measure the vibrational frequency of the following
bonds:
i)The stretching frequency of l4N-?N
ii)The c?Z?CS" inEthyne, (CHECK)
iii)The C=O Str in acetone, CHsCOCHs
iv)The Re-Re str in compound, (CO)5Re-Re(CO)5
What is Beer-Lambert law in UV-Visible absorption spectroscopy? A compound
having concentIation lO'Sg/l resulted absorbance value 0.20 at 1 max 510 nm using 1.0
cm cell. Calculate its absorptivity and molar absorptivity values. Molecular weight of
compound is 400. Can ultIa-violet spectral data be useful to distinguish the following
compounds? Give reasons.
(i) Ethyl benzene and styrene. WM
(ii) CH2=CH-CH2-CH=CH2 and CH2=CH-CH=CH-C}{5;
.w. , . 3?: "
Attempt any one part of the following: ?w > 10 x 1= 10 5???
De?ne and explain the terms involved :11; ase rule. Draw a neat labeled pl?e
diagram of water system and c areasifmacalculate degree of freedom of area?hnd
curves in it What IS the Signi?cange?bf the triple point and metastable cunt; iii the
system? ? ?3"
Describe the mechanism of daghochemical or wet corrosion with hgfpgof reactions?
Explain the cathodic prot?h method of prevention of corrosion 3K ?
1%
1:9,:
Attempt any one pmnf the following: 10 x 1= 10
Explain reverse osmosis with its advantages A water maple on analysis gives the
following data: Ca2+ =20 ppm. Mg2*=25 ppm, C02 ? 3mm HCO: =150 ppm. K+ =
10 ppm Calculate the lime (8" 0 pure) and soda (%%pme) required to soften 10" liter
of sample water.
Describe proximate analysis of fuels. A coal?hdfple has the following composition by
weight: C:90% 0: 3% 8:0 5% N=0 5:!)6: nhd Ash=2. 5% Net calori?c value of the
coal was found to be 8, 490 5 kcal/kg ?a1culate the percentage of hydrogen and Gross
calori?c value.
Attempt any one part of th'e?i?owing: 10 x l = 10
Write a note on (i) Polym?hhlends (ii) Polymer composites
Differentiate between elastorhcrs and ?bers? Give the preparation, properties and uses
of Buna-S, Buna-N and Neoprene.
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This post was last modified on 29 January 2020