BT-101 (GS) – Engineering Chemistry
• Attempt any five questions.
• All questions carry equal marks.
a)Unit 2Write short note on
i) Sludge and Scale
ii) Caustic Embrittlement
iii) Boiler Corrosion
Write short note on
i) Sludge and Scale
ii) Caustic Embrittlement
iii) Boiler Corrosion
b)Unit 1100 ml water sample required 20 ml of N/50 H2SO4 for neutralisation to Phenolphthalein end point. After Methyl Orange was added to this and further acid required was 2.5 ml. Calculate the alkalinity type and extent in terms of CaCO3 equivalent.
100 ml water sample required 20 ml of N/50 H2SO4 for neutralisation to Phenolphthalein end point. After Methyl Orange was added to this and further acid required was 2.5 ml. Calculate the alkalinity type and extent in terms of CaCO3 equivalent.
a)Unit 3An oil sample under test has a Saybolt Universal Viscosity same as that of Standard Gulf oil (low viscosity standard) and Pennsylvanian oil (high viscosity standard) at 210°F. Their Saybolt Universal Viscosities at 100°F are 61, 758 and 420 seconds, respectively. Calculate viscosity index of the sample.
An oil sample under test has a Saybolt Universal Viscosity same as that of Standard Gulf oil (low viscosity standard) and Pennsylvanian oil (high viscosity standard) at 210°F. Their Saybolt Universal Viscosities at 100°F are 61, 758 and 420 seconds, respectively. Calculate viscosity index of the sample.
b)Unit 2Describe ion exchange process used for softening of water with neat diagram. A zeolite softener was 90% exhausted by removing the hardness completely when 10,000L of hard water sample passed through it. The exhausted zeolite bed required 200L of 3% NaCl solution for its complete regeneration. Calculate the hardness of water sample.
Describe ion exchange process used for softening of water with neat diagram. A zeolite softener was 90% exhausted by removing the hardness completely when 10,000L of hard water sample passed through it. The exhausted zeolite bed required 200L of 3% NaCl solution for its complete regeneration. Calculate the hardness of water sample.
Unit 3Explain the following properties of the following (any two)
i) Aniline Point
ii) Cloud and Pour Point
iii) Flash and Fire Point
Explain the following properties of the following (any two)
i) Aniline Point
ii) Cloud and Pour Point
iii) Flash and Fire Point
a)Unit 4Differentiate chain growth and step growth polymerization. Explain Free radical and Ionic polymerization with the help of suitable example.
Differentiate chain growth and step growth polymerization. Explain Free radical and Ionic polymerization with the help of suitable example.
b)Unit 4Distinguish between thermoplastic and thermosetting resins. Give preparation and application of Urea-Formaldehyde and PVC.
Distinguish between thermoplastic and thermosetting resins. Give preparation and application of Urea-Formaldehyde and PVC.
a)Unit 5Define and explain the terms involved in the phase rule. Draw a neat labelled phase diagram of water system and explain the areas and curves in it. What is the significance of the triple point and meta stable curve in this system?
Define and explain the terms involved in the phase rule. Draw a neat labelled phase diagram of water system and explain the areas and curves in it. What is the significance of the triple point and meta stable curve in this system?
b)Unit 3What are the important properties that an efficient lubricant should possess? 1.5 gm of a lubricant oil dissolved in alcohol require 2.4 ml of 0.0125 N alcoholic KOH for neutralization. What is neutralization value of the lubricant? If an oil to be used in machinery should not have neutralization value greater than 8.0, is it safe to use the test sample as a lubricant in the machinery?
What are the important properties that an efficient lubricant should possess? 1.5 gm of a lubricant oil dissolved in alcohol require 2.4 ml of 0.0125 N alcoholic KOH for neutralization. What is neutralization value of the lubricant? If an oil to be used in machinery should not have neutralization value greater than 8.0, is it safe to use the test sample as a lubricant in the machinery?
a)Unit 6How can a combination of UV and IR spectroscopy be used to determine the structure of an unknown organic compound? Illustrate with an example.
How can a combination of UV and IR spectroscopy be used to determine the structure of an unknown organic compound? Illustrate with an example.
b)Unit 6What is Electronic spectroscopy? An unknown substance absorbs 40% of the light of wavelength 43.5 nm in a cell of 2 cm dimension when has a concentration of 20 gL−1. Under the similar conditions, what percentage of light will be absorbed by a solution containing 40 gL−1 of the same unknown substance?
What is Electronic spectroscopy? An unknown substance absorbs 40% of the light of wavelength 43.5 nm in a cell of 2 cm dimension when has a concentration of 20 gL−1. Under the similar conditions, what percentage of light will be absorbed by a solution containing 40 gL−1 of the same unknown substance?
Unit 2What is Lime Soda process? Calculate the amount of lime and soda required for softening of 20,000 liters of water whose analysis is: Ca(HCO3)2 = 40.0 ppm; Mg(HCO3)2 = 36.5 ppm; CaSO4 = 34.0 ppm; MgSO4 = 30.0 ppm; CaCl2 = 27.75 ppm.
What is Lime Soda process? Calculate the amount of lime and soda required for softening of 20,000 liters of water whose analysis is: Ca(HCO3)2 = 40.0 ppm; Mg(HCO3)2 = 36.5 ppm; CaSO4 = 34.0 ppm; MgSO4 = 30.0 ppm; CaCl2 = 27.75 ppm.
a)Unit 7Write brief note on (Any two)
i) Electro negativity
ii) Polarizability
iii) Oxidation states
Write brief note on (Any two)
i) Electro negativity
ii) Polarizability
iii) Oxidation states
b)Unit 7Write brief note on (Any two):
i) Electron affinity
ii) Effective Nuclear Charge
iii) Aufbau rule
iv) Atomic and Ionic size
Write brief note on (Any two):
i) Electron affinity
ii) Effective Nuclear Charge
iii) Aufbau rule
iv) Atomic and Ionic size