Physical Chemistry BS Chemistry 4 Semester/Term BZU — Bahauddin Zakariya University 2022
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Paper text
Bahauddin Zakariya University Multan
5 Chemity
Examination: Final Term (BS 4® Semester)
Course Title: Physical Chemistry-F
Fime Allowed: 2:30 Hours
653922-26
Roli No：...，
Course Code: CHEM-272
Total Marks: 60
Note: Attempt all Questions riven below.
Q.I: Write short answers of the following questions.
10 × 3=30
i
How equilibrium constant helps to predict the extent of reaction?
How order of renetion can be determined by integrated rate equation method?
Write down any four differences between thermal and photochemical reactions.
Differentiate between parallel and opposing reactions by giving one example of each.
Slowest step of a multistep reaction is the rate determining stop. Justify with cos
example..
Differentiste between ordee of reaction and molecularity of reaction.
VEL
What is equilibrium constant? It may or tay not have units justify by giving two
examples.
vili
How order of reaction can be determined by half-life method
İx
How temperature change affeets rate of reaction?
State rate law. Give dee example.
Long Questions
（3×10=30））
Q.2: Derive kinetic expression fur thermal docomposition of acetaldehyde.
Q.3 Derive Van't Hoff Equation. Also describe the effect of tempernture and pressure on
equilibrium constant and position of equilibrium.
0.4: Derive kinetic expression for thirt order reaction having different initial concentrations
of the all three reactants
Good Luck
B5:394-22-8-80
