Dr. A.P.J. Abdul Kalam University BE II SEM (CSE/EC/EX/IT) Chemistry [CY110T] June 2021 Question Paper

Dr. A.P.J. Abdul Kalam University

Bachelor of Engineering

Second Semester Main Examination, June-2021

Chemistry [CY110T]

Branch: CSE/EC/EX/IT

Time: 3:00 Hrs Max Marks 70

Note : Attempt any five questions out of eight.

All questions carry equal marks.

Q.1 (a) What is the molecular orbital theory? With the help of MO diagram calculate

the bond order of the following: CO, NO, O2, O2 –, O2 2–

 (b) Discuss the differences between order of the reaction and molecularity of a

reaction.

Q.2 (a) Define the Order of reaction. Explain the Methods of determining order of

reaction (Ist & 2nd Order).

 (b) Define the following terms:

 (a) Component (b) Phase (c) Degree of freedom (d) Corrosion

Q.3 (a) What are polymers? Classify them on the basis of structure and heat stability

with suitable examples.

 (b) Write short note on:

 (a) Nylon 66 (b) Poly Vinyl Chloride (c) Teflon

 (d) Phenol formaldehyde resin (e) Nylon 6 (f) Urea-formaldehyde resin

Q.4 (a) What is vulcanization? Explain with proper reaction. Mention the advantages

of vulcanized rubber

(b) What do you understand by valence-shell electron-pair repulsion (VSEPR)

 model? Give the hybridization of CO2, SO2, CH4 SF4, and SF6 molecules.

Q.5 (a) What do you know by Electrochemistry? Explain Arrhenius theory of

electrolytic dissociation.

(b) Write a short not on following:

(i) Transport Number

(ii) Kohlrausch’s Law

(iii) Solubility Product

(iv) Redox Reaction

(v) Electrochemical Cells

Page [2]

Q.6 (a) 0.5g of CaCo3 was dissolved in dilute HCL and diluted to 500 ml with

distilled water ,50 ml of this solution required 48 ml of EDTA solution for

titration.50ml of hard water sample required 15 ml of EDTA solution for

titration.50 ml of same water sample on boiling and filtering requires 10 ml of

EDTA solution . Calculate temporary, permanent and total hardness in ppm.

(b) 100ml of water sample on titration with N/20 HCl required 10 ml of the acid

to phenolphthalein end point and 12 ml of acid to methyl orange end point.

Calculate the type and extent of alkalinity present in water sample.

Q.7 (a) Explain the detailed procedure for determining the flash & fire point of

lubricating oil.

(b) Explain followings:

(i) First law of thermodynamics & Second law of thermodynamics

(ii) Gibb’s free energy

(iii) Enthalpy and Entropy

(iv) Relation between Cv & Cp

Q.8 (a) Write short note on:

 (a) Cloud & Pour point (b) Aniline Point (c) Saponification number

 (d) Neutralization number (e) viscosity

(b) Explain the Poly Vinyl Chloride (PVC) on the basis of Its Properties,

Preparation and Uses.

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