Previous year question paper for Chemistry (Diploma Electronics and Communication Engineering 1st-2nd)

Applied Chemistry

Previous year question paper with solutions for Applied Chemistry from 2014 to 2018

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1. Metallurgy (08 hrs)

1.1 A brief introduction of the terms: Metallurgy (types), mineral, ore, gangue or

matrix, flux, slag, concentration (methods of concentrating the ores), ore, roasting,

calcinations, smelting and refining of metal.

1.2 Metallurgy of (i) Aluminium (ii) Iron

1.3 Definition of an alloy, purposes of alloying, composition, properties and uses of

alloys, monel metal, magnalium, duralumin, alnico, stainless steel and invar.

2. Fuels (10 hrs)

2.1 Definition of a ‘Fuel’, characteristics of a good fuel and classification of fuels

with suitable examples

2.2 Definition of Calorific value of a fuel and determination of calorific value of a

solid fuel with the help of Bomb calorimeter. Simple numerical problems based

upon Bomb-calorimeter method of finding the Calorific values

2.3 Brief description of ‘Proximate’ and ‘Ultimate’ analysis of a coal. Importance of

conducting the proximate and ultimate analysis of a fuel

2.4 Merits of gaseous fuels over those of other varieties of fuels

2.5 Manufacture, composition, properties and uses of (i) Water gas (ii) Oil gas (iii)


2.6 Composition, calorific values and applications of (i) LPG (ii) CNG (iii) Power



2.7 Fuel rating

2.7.1 Octane number for petrol

2.7.2 Cetane number for diesel

3 Corrosion (06 hrs)

3.1 Definition of corrosion

3.2 Theories of corrosion i.e. (i) direct chemical action theory and (ii) electro

chemical theory

3.3 Passivity

3.4 Prevention of corrosion by

3.4.1 Alloying

3.4.2 Providing metallic coatings

3.4.3 Cathodic protections:

(a) Sacrificial

(b) Impressed voltage method

3.4.4 Heat treatment (quenching, annealing, tempering & normalizing)

4 Lubricants (06 hrs)

4.1 Definition of (i) lubricant (ii) lubrication

4.2 Classification of lubricants

4.3 Principles of lubrication

4.3.1 fluid film lubrication

4.3.2 boundary lubrication

4.3.3 extreme pressure lubrication

4.4 Properties of lubricants

4.4.1 Physical properties: viscosity, viscosity index, flash-point, fire-point,

cloud-pour point, oiliness, volatility, emulsification

4.4.2 Chemical properties-Total acidity number (TAN) saponification and

iodine value, coke number and aniline point.

4.5 Criterion for selection of a good lubricant

5 Glass (04 hrs)

5.1 Glass: Chemical composition, types of glasses and their applications

5.2 Manufacture of ordinary glass and lead glass

6. Classification and Nomenclature of Organic Compounds (06 hrs)

Classification of Organic Compounds, functional group, Homogolus Series, IUPAC- Nomenclature of various homogolous series i.e. alcohols, aldehydes, ketones, carboxylic

acids, and phenols. (First six members of each series only)

7. Polymers & Plastics (08 hrs)

7.1 Definition of polymer, monomer & degree of polymerization

7.2 Brief introduction of addition & condensation polymers with suitable examples

(PVC, Polyester, Teflon, Nylon 66, Bakelite)

7.3 Definition of plastic & type of plastics (thermo & thermo setting plastics) with

suitable examples

7.4 Applications of polymers & plastics in daily life