APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY Previous Years Question Paper & Answer

Course : B.Tech

Semester : S1 and S2

Year : 2017

Term : MAY

Scheme : 2015 Full Time

Course Code : CY 100

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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SECOND SEMESTER B.TECH DEGREE EXAMINATION, MAY 2017

Course Code: CY100
Course Name: ENGINEERING CHEMISTRY

Max. Marks: 100 Duration: 3 Hours

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18.

೫.೬೧ A
Answer all questions, each question carries 2 marks.

Chemical shift value of methyl chloride is lower compared to that of methy! fluoride. `
Why?
Can a Ni spatula be used to 7 (0504 solution? Give reason.

E°N= -0.23V, മപ 0.34%
Why TLC is superior to column chromatography for checking purity of a compound?
List out the advantages of OLEDs.
Write the chemical transformation of a vegetable oil to biodiesel.
Distinguish between flash point and fire point of a lubricant.
Calculate the hardness of a solution obtained by mixing 100ml 0.02M CaCl and 200௩1
0.02M MgSO, solutions.
What is the chemistry behind the removal of temporary hardness by boiling?

PART B
Answer all questions, each question carries 3 marks.

List all the electronic transitions possible for CH3Cl and HCHO.

. Derive an expression connecting electrolytic concentration to electrode potential.
. Compare HPLC and column chromatography.

. Brief out the preparation of silicones.

. Calculate GCV and NCV of butane using Dulong’s formula.

. Based on the structure comment on the lubricating action of graphite.

. Outline a process by which sea water can be made fit for domestic applications.

. BOD is an index of organic load in waste water. Justify.

PART C

Each question carries 10 marks.

. (a) Predict the splitting pattern in the nmr spectra of CH3CH2COOCH3and CH3CHCh

(b) The fundamental vibrational frequency of carbon monoxide (200) is
2140 cm! Without calculating force constant, find the fundamental frequency of
1360170 in cm", [5+5]
OR
(a) Which among the following molecules will give നന്‌ transition.
(21656, CH3CHO, CsHsCONH2, C2HsOH, கே Rationalize your answer.
(b) Briefly explain chemical shift and factors affecting it. [5+5]

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