B.Tech R23 Chemistry Important Questions
UNIT I
2 Marks Questions:
- What is the significance of Ψ and Ψ²?
- Write the Schrödinger wave equation and explain its significance
- Define linear combination of atomic orbitals
5 Marks Questions:
- Write Schrödinger wave equation and explain its significance in Quantum mechanics
- Discuss about significance of Ψ and Ψ²
- Explain Linear combination of Atomic Orbitals
- Explain the particle in one dimensional box with suitable mathematical treatment
- Draw the molecular orbital energy level diagrams of O₂ and CO molecules and calculate their bond orders
- Discuss Salient features of Molecular Orbital Theory
UNIT II
2 Marks Questions:
- What are nanoparticles? Give two examples
- What is a semiconductor? Give suitable example
- Define superconductors and mention their classification
5 Marks Questions:
- Explain basic principle of Semiconducting materials
- What are the important engineering applications of semi conducting materials?
- Explain the basic concepts and applications of Super-conductors with examples
- What are Nano particles? Write applications of Fullerene
- Explain the classification and applications of supercapacitors
- Discuss the properties and applications of carbon nanotubes and graphene nanoparticles
UNIT III
2 Marks Questions:
- What is meant by electrochemical sensors? Explain Amperometric sensors
- Define electrode potential and write Nernst equation
- What is a fuel cell? Give an example
5 Marks Questions:
- Describe the working principle and applications of Lithium-ion batteries
- Explain the advantages of fuel cells over electrochemical cells
- Write the Nernst equation for electrode potential. Discuss briefly Potentiometric sensors
- Explain PEMFC fuel cell with neat sketch
- Explain conductometric titrations with suitable examples for acid-base titrations
- Describe the construction and working of Hydrogen-Oxygen fuel cell with cell reactions
UNIT IV
2 Marks Questions:
- Distinguish between thermoplastics and thermosetting plastics
- Define polymerization process and mention types
- What are conducting polymers? How are they classified?
5 Marks Questions:
- Write the preparation, properties and applications of Buna-S and Buna-N rubbers
- Write Preparation, properties and applications of PVC
- Explain the mechanism of free radical addition polymerization with examples
- Discuss the preparation, properties and applications of Teflon and Bakelite
- Distinguish between chain growth and step growth polymerization process with suitable examples
- Explain preparation, properties and applications of PGA and PLA
UNIT V
2 Marks Questions:
- Write about basic principle involved in Chromatography
- State Beer-Lambert's law and write its mathematical expression
- What is electromagnetic spectrum?
5 Marks Questions:
- Explain Electronic transition occur in UV-Visible spectroscopy
- Write about important applications of IR spectroscopy
- Explain the principle and instrumentation of UV-Visible spectroscopy with neat diagram
- Discuss important applications of UV-Visible Spectroscopy
- Explain the fundamental modes of vibration in IR spectroscopy with selection rules
- Discuss briefly components of an HPLC instrument and explain the functions of various components