B.TechSemester 12024-25Engineering ChemistryBAS102

Engineering Chemistry (BAS102) - AKTU Question Paper 2024-25

B.Tech · Semester 1 · Free PDF Download

This is the official AKTU Engineering Chemistry Previous Year Question Paper for B.Tech Semester 1, academic session 2024-25. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech

Semester:Semester 1

Session:2024-25

University:AKTU / UPTU

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Questions Asked in 2024-25

Engineering Chemistry (BAS102) — complete question paper · 70 marks · 3 Hours

Section AAttempt all questions in brief. 2 x 07 = 14

a
Is it possible to achieve 100% waste-free chemical manufacturin g? If not, what are the limitations?
b
Why do some cholesteric liquid crystals reflect only certain wa velengths of light while others do not?
c
Can a molecule be chiral in one environment but achiral in anot her? Provide a theoretical example
d
Can corrosion occur in the vacuum of space? If so, under what conditions?
e
A dry cell battery loses charge even when not in use. What fund amental chemical processes lead to its slow degradation?
f
Which type of water contaminatio n- chemical or microbial- is mo re difficult to remove? Justify your answer
g
Why can thermosetting polymers not be reshaped upon heating, wh ile thermoplastic polymers can?

Section BAttempt any three of the following: 7 x 3 = 21

a
If a bulk material is optically transparent, will its nanomaterial counterpart also be transparent? Justify with an example
b
Two enantiomers of a drug have different half-lives in the body . Explain the biochemical basis for this phenomenon
c
How can the 12 Principles of Green Chemistry be applied to cement production to reduce environmental impact?
d
Why is natural gas preferred over coal for power generation, ev en though coal 4 2 is more abundant? Two coal samples have identical fixed carbon content but different volatile matter percen tages. How will this affect the ir combustion properties?
e
Discuss the primary degradation mechanisms that affect polymer stability in different environmental conditions

Section CAttempt any one part of the following: 07 x 1 = 07

a
A hypothetical molecule X 2 has a bond order of 2.5. Propose possible charge states or electronic configurations for this molecule
b
Given that paracetamol can be syn thesized via both conventional and green routes, what challenges exist in fully replacing the convention al method with the green method?
a
How can a combination of UV, IR, and NMR spectroscopy be used t o determine the structure of an unknown organic compound? Illustr ate with an example
b
A compound has the molecular formula C₄H₈O₂. It shows a singlet at 3.8 ppm and a quartet at 1.2 ppm in its ¹H NMR spectrum. Predict its st ructure and justify your answer
a
Why does Portland cement contain both tri-calcium aluminate and di-calcium silicate, even though their hydration rates are vastly differen t? The hydration of cement releases heat, yet adding excess water weakens concrete. Explain the paradox
b
Brass exposed to seawater loses zinc over time, leaving behind a copper-rich structure. Explain the underlying electrochemical process
a
Why is the Zeolite process unsuita ble for water containing high concentrations of iron and manganese?A 500 L water sample requires 50 mL of 0.01 M EDTA to completely react with its calcium and magnesium ions. Calcul ate the total hardness in ppm as CaCO3
b
i . C a n h y d r o g e n b e c l a s s i f i e d a s b o t h a p r i m a r y f u e l a n d a s e c ondary fuel? Justify your answer. ii. A fuel with a GCV of 35 MJ/kg has an NCV of 32 MJ/kg. Explain why there is a difference and how to calculate it
a
Why is it necessary to perform the preparation of Grignard r eagents under anhydrous conditions?If 5.0 g of methylmagnesium bromide is rea cted with an excess of benzaldehyde, how much benzyl alcohol (C₆H₅CH₂OH) is expected, assuming 85% yield?
b
Ex pl a i n w h y w a t er a nd oi l s d o n ot a dh e re t o T e fl o n . H ow d oe s this property make it suitable for non-stick co okware and industrial applicat ions? A piece of Teflon has a mass of 250 g and a density of 2.2 g/cm³. Calculate its volume

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

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