(a)Describe the assumption of Bohr's atomic model. Based on Bohr's calculation, establish the energy expression of the rotation of electrons in Hydrogen like atomic species. [8]
(b)Derive de-Broglie's equation for the dual nature of matter. Apply this equation for microscopic and macroscopic properties of substances. [6]
(c)What are the postulates of Quantum Mechanics? [6]
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Q. 3
(a)What is Third law of thermodynamics? How it is used to determine the entropies of substance. [7]
(b)Discuss the isothermal expansion of a gas and derive the equation for the work done due to expansion of a gas. [7]
(c)Explain the law of corresponding states. [6]
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Q. 4
(a)Deduce the rate expression for 2nd order reaction where both the concentration terms are same. What is the half-life period for the 2nd order reaction? [10]
(b)What is activation energy? How it can be determined? [5]
(c)Write a note on Transition state theory of reaction rates. [5]
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Q. 5
(a)Develop a relation among phase, component and degree of Freedom. Draw a complete diagram for water system. [10]
(b)What is catalysis? Differentiate between positive and negative catalysis. [6]
(c)What is stoichiometry? Explain it with help of examples. [4]
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Q. 6
(a)State and explain Lowry-Bronsted theory and Lewis theory of acids and bases. In what way Lewis theory differs from Bronsted theory. [8]
(b)Explain with the help of examples why pH of a buffer solution does not change significantly on small addition of acids and bases. [6]
(c)What are indicators? How a suitable indicator can be chosen? Discuss. [6]
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Q. 7
(a)Give an account of phenomena of isomerism in co-ordination compound with suitable example. [8]
(b)Describe the extraction of thorium from mozite sand. [6]
(c)Compare the properties of lanthanides and actinides? [6]
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Q. 8
(a)Explain Kohlrausch's Law? Give its applications. [7]
(b)What is meant by transport number of ions? Give different methods for determination of transport number. [7]
(c)What is specific conductance? How it can be determined by using Wheatstone bridge? [6]
The 2019 CSS Chemistry paper set by the FPSC. Question wording only; questions marked “Not yet checked” have not been compared with the official paper yet.
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