BT-101 (GS) – Engineering Chemistry
• Attempt any five questions.
• All questions carry equal marks.
a)Unit 1Define Hardness of water. Explain the various units of hardness and their inter-relationship. Why is EDTA method preferred over other methods for hardness determination?
Define Hardness of water. Explain the various units of hardness and their inter-relationship. Why is EDTA method preferred over other methods for hardness determination?
b)Unit 1Explain the principle of EDTA titration. Calculate the total hardness (in ppm) of a water sample containing: Ca(HCO3)2 = 16.2 mg/L, Mg(HCO3)2 = 7.3 mg/L, MgCl2 = 9.5 mg/L and CaSO4 = 13.6 mg/L.
Explain the principle of EDTA titration. Calculate the total hardness (in ppm) of a water sample containing: Ca(HCO3)2 = 16.2 mg/L, Mg(HCO3)2 = 7.3 mg/L, MgCl2 = 9.5 mg/L and CaSO4 = 13.6 mg/L.
a)Unit 2Compare Zeolite and Ion-Exchange processes for water softening. Discuss why Ion-Exchange is superior for high-pressure boilers.
Compare Zeolite and Ion-Exchange processes for water softening. Discuss why Ion-Exchange is superior for high-pressure boilers.
b)Unit 1What is Desalination? Describe the Reverse Osmosis (RO) process with a neat labeled diagram. State its industrial applications.
What is Desalination? Describe the Reverse Osmosis (RO) process with a neat labeled diagram. State its industrial applications.
a)Unit 7What is periodic table? Write trends of following in a group and in a period giving suitable reasons: (i) electronegativity (ii) electron affinity (iii) atomic size
What is periodic table? Write trends of following in a group and in a period giving suitable reasons: (i) electronegativity (ii) electron affinity (iii) atomic size
b)Unit 7Write brief note on (any two) : (i) Effective nuclear charge (ii) Polarizability (iii) Oxidation states
Write brief note on (any two) : (i) Effective nuclear charge (ii) Polarizability (iii) Oxidation states
a)Unit 4Discuss the mechanism of Addition and Condensation polymerization with one example each. Define Functionality of a monomer.
Discuss the mechanism of Addition and Condensation polymerization with one example each. Define Functionality of a monomer.
b)Unit 4Write the synthesis, properties and engineering uses of: (i) Bakelite (ii) PMMA (iii) Neoprene
Write the synthesis, properties and engineering uses of: (i) Bakelite (ii) PMMA (iii) Neoprene
a)Unit 3Define Lubrication. Explain the mechanism of Extreme Pressure Lubrication. Which type of lubricants are used for heavy-duty machinery?
Define Lubrication. Explain the mechanism of Extreme Pressure Lubrication. Which type of lubricants are used for heavy-duty machinery?
b)Unit 3Discuss the importance of Viscosity Index. How does it affect the performance of an engine oil in varying temperatures?
Discuss the importance of Viscosity Index. How does it affect the performance of an engine oil in varying temperatures?
a)Unit 6State the selection rules for IR Spectroscopy. Explain why some molecules are IR Active and some are not. Describe the various types of molecular vibrations.
State the selection rules for IR Spectroscopy. Explain why some molecules are IR Active and some are not. Describe the various types of molecular vibrations.
b)Unit 6Explain the principle of Thin Layer Chromatography (TLC). How is the Rf value calculated and what does it indicate?
Explain the principle of Thin Layer Chromatography (TLC). How is the Rf value calculated and what does it indicate?
a)Unit 5Explain the Differential Aeration Theory of corrosion with the help of Pitting Corrosion example. Why do iron nails rust faster in saline water?
Explain the Differential Aeration Theory of corrosion with the help of Pitting Corrosion example. Why do iron nails rust faster in saline water?
b)Unit 5What is Sacrificial Anodic Protection? How is it used to protect underground pipelines? Compare it with Impressed Current Cathodic Protection.
What is Sacrificial Anodic Protection? How is it used to protect underground pipelines? Compare it with Impressed Current Cathodic Protection.
a)Unit 2Explain the chemical reactions involved in the Lime-Soda process. Why is a small amount of coagulant (like Alum) often added during this process?
Explain the chemical reactions involved in the Lime-Soda process. Why is a small amount of coagulant (like Alum) often added during this process?
b)Unit 2What is lime-soda process? Calculate the requirement of Lime (80% pure) and Soda (90% pure) for treatment of 1,00,000 liters of water containing: Ca(HCO3)2 = 40.5 ppm, Mg(HCO3)2 = 36.5 ppm, MgSO4 = 30 ppm and CaCl2 = 22.2 ppm.
What is lime-soda process? Calculate the requirement of Lime (80% pure) and Soda (90% pure) for treatment of 1,00,000 liters of water containing: Ca(HCO3)2 = 40.5 ppm, Mg(HCO3)2 = 36.5 ppm, MgSO4 = 30 ppm and CaCl2 = 22.2 ppm.