Hours: 8 | Marks: 8
Chemical kinetics म्हणजे reaction चा वेग (rate) आणि त्यावर परिणाम करणारे factors चा अभ्यास
Definition:
Reactant किंवा product च्या concentration मध्ये होणारा बदल प्रति वेळ
Unit:
mol L⁻¹ sec⁻¹
Definition:
Rate equation मध्ये concentration च्या power ची बेरीज
Example:
First order reaction
Definition:
Reaction मध्ये सहभागी molecules ची संख्या
Example:
Unimolecular
| Order | Molecularity |
|---|---|
| Experimental | Theoretical |
| Can be zero | Never zero |
Equation:
[A] = [A₀] – kt
Half life:
t½ = [A₀] / 2k
Equation:
k = 2.303/t log(A₀/A)
Half life:
t½ = 0.693/k
Derivation with:
Equal concentration
Different concentration
Examples:
Hydrolysis of methyl acetate
Saponification of ethyl acetate
Inversion of cane sugar
Graphical method
Half life method
Van’t Hoff method
Ostwald isolation method
Arrhenius Equation:
k = Ae⁻ᴱᵃ/ᴿᵀ
Energy required to start reaction
Hours: 7 | Marks: 7
Photochemical:
Light required
Example:
Photosynthesis
Relation between:
Absorption and thickness
Relation between:
Absorption and concentration
Light must be absorbed
One photon activates one molecule
Definition:
Number of molecules reacted / photons absorbed
Decomposition of HI
Fluorescence:
Immediate emission
Phosphorescence:
Delayed emission
Energy level diagram
Example:
Firefly
Hours: 8 | Marks: 8
Definition:
Measure of polarity
Unit:
Debye
Determine molecular structure
Determine ionic character
Polarization relation
Magnetic susceptibility
Magnetic moment
| Type | Example |
|---|---|
| Diamagnetic | Benzene |
| Paramagnetic | Oxygen |
| Ferromagnetic | Iron |
μ = √n(n+2)
Used to measure magnetic susceptibility
Hours: 7 | Marks: 7
Types:
Metallic
Electrolytic
Unit:
Ohm
Unit:
Siemens
Application:
Acid-base titration
Definition:
Ion movement fraction
Transport number determination
Independent migration of ions
Weak electrolyte study
1. Define and explain key terms such as reaction rate, order of reaction, and molecularity.
2. Distinguish between zero, first, and second-order reactions, providing examples and deriving their
respective rate equations
3. Distinguish between polar and non-polar molecules, understand dipole moments, and discuss
polarization, including the Clausius-Mossotti equation qualitatively.
4. Differentiate between paramagnetic and diamagnetic substances, understand the origins of various
magnetic behaviors
5. Analyze factors leading to high or low quantum yields and describe methods for their experimental
determination
6. Describe phenomena such as fluorescence and phosphorescence utilizing the Jablonski Diagram.
7. Explain ion migration under electric fields, determine transport numbers using Hittorf’s and moving
boundary methods
8. Apply Kohlrausch’s law to evaluate ion migration.
9. Calculate the degree of dissociation for weak electrolytes and determine their dissociation constants
"Good day, everyone! I'm Mayuresh, and I'm incredibly thrilled to be your chemistry teacher. For as long as I can remember, the intricate dance of atoms and molecules has captivated me. From the enchanting world of chemical reactions to the marvels of the periodic table, my aim is to ignite that same sense of wonder and curiosity within each of you. With a background in M.Sc Chemistry, I'm here not only to teach but also to inspire and guide you through the exciting realms of chemistry. Together, let's uncover the mysteries, perform fascinating experiments, and delve into the depths of this captivating scientific discipline."
BSC Semester 4 Chemistry Major Paper 2 (NEP)
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