Chemistry ADA/ADS/BE 1 Semester/Term UOS — University of Sargodha 2023

University of Sargodha

ADA/ADS Part-I/Composite 1" A-Exam 2023

Subject: Chemistry

Paper: I-A

Maximum Marks: 40

Time Allowed: 3 Hours

Note: Attempt any five questions, selecting at least two questions from each section.

questions carry equal marks.

Section-l

Q.1.

a) Define trigonometric function with at least two examples.

b) How can a trigonometric function be integrated, explain with suitable examples.

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Q.2.

a) How does an ideal gas differ from a real gas?

b) Define refractive index of a liquid, give its importance.

Q.3.

a) What is the significance of Van der Waal's constants 'a' and 'b

Q.4.

b) Define unit cell? How will you classify the crystals into various

a) Derive Schrödinger's wave equation and give its physical signifi

b) What are the limitations of DE Broglie Wave-particle?

Q.5.

a) Define molar heat capacity of a gas? Show that Op-Que R

b) Discuss 1" law of thermodynamics with suitable examples.

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Section

Q.6.

a) Derive a relationship between different typi

of equilibrium constants (Kp, Ke, Kx and

Kh) yotan soustastems? When do they all hang the same value?

b) Explain Le-Chatalier's principle and

conditions for maximum formation of

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ammonia?

Q.7.

a) What is Osmotic pressufe of a solution? How is it determined?

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b) Derive an equation for elevation of boiling point and calculate the molecular mass of a

solute

Q.8.

a) What is the differen

reen order and molecularity of a chemical reaction?

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b) Define reaction rite constant? Derive Arrbenius equation showing the effect of

Q.9.

temperature on the rate of a reaction.

a) Define Kohlauren's law of independent migration of ions? Give its four applications.

b) What is Ostwald's dilution law? How will you determined the degree of dissociation

of a week electrolyte?

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Q.1D.

a) Define colloids? What are its types?

b) Define an isotherm and give its properties.