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FSC 1st Year Chemistry Guess Paper 2018

F.Sc 1st Year Chemistry Guess Paper 2018

F.Sc 1st Year Chemistry Guess Paper 2018

Chapter No. 1

 (a). Give postulates of Bohr’s atomic model. Also describe defects of Bohr’s atomic model. Derive the equation for the radius for nth orbit of hydrogen atom using Bohr’s model.

(b). Give two statements of Raoult’s law. State different forms of Raoult’s law. Also differentiate b/w ideal and non deal solutions. Also explain the fractional distillation of ideal mixture of two liquids

Chapter No. 2

 (a). What is order of reaction? Explain various methods for finding order of reaction. Describe how the rate of a reaction can be measured by a chemical method?

(b). Describe Arrhenius equation. Explain the effect of temperature on the rate of reaction with the help of Arrhenius Equation. Also describe how Arrhenius equation helps us to calculate the energy of activation of a reaction.

Chapter No. 3

 (a). Give graphical explanation for elevation of boiling point of a solution by Landsberger’s Method and derive an equation. What is the effect of the boiling point on external pressure? Why the temperature of liquid remains at boiling point although heat is continuously supplied.

(b). What is the difference b/w single electrode potential and standard electrode potential? Explain the measurement of electrode potential with the help of Standard Hydrogen Electrode (SHE). Also describe the construction of voltaic cell and reaction occurring in the cell.

Chapter No. 4

(a). Define vapour pressure. Describe the measurement of vapour pressure by monometric method.

(b). Describe Dalton’s law of partial pressure. Write its applications.

Chapter No. 5

(a). Describe Milikan’s oil drop method for determination of charge of electron. OR How the charge on electron was measured by oil drop method?

(b). State and explain first law of thermodynamics. OR Prove that H=qv

Chapter No. 6

 (a). Classify solids on the basis of binding. Define ionic solids. How ionic solids are formed? Give properties of ionic solids?

(b). What is orbital/atomic hybridization? Give its advantages Discuss SP2 hybridization with example. Explain bonding and structure of ethene (CH) on the basis of hybridization? Explain the geometry of NH3 and H20 by hybridization.

Chapter No. 7

 (a). Write main postulates of VSEPR theory. Give salient features of this theory. Also explain the structure of NH3 and H20 on the basis of this theory.

(b). Explain half life method for determining order of reaction.

Chapter No. 8

(a). Explain Enthalpy and prove that f= qe

(b). State and explain with an example, the Hess’s law of constant heat summation.

Chapter No. 9

(a). Calculate the pH of buffer solution in which……(Unit 8)

(b). The solubility of PbF2 at 25c…..(Unit 8)

Chapter No. 10

(a). Give the basis of the molecular orbital theory and explain the paramagnetic character of O2 molecule on the basis of Molecular Orbital Theory (M.O.T)?

(b). Differentiate b/w homogeneous & heterogeneous catalyst with examples.

Chapter No. 11

 (a). What are molecular solids? Give their properties.

(b). State and explain Graham’s law of diffusion from kinetic molecular theory of gases. Also give its experimental verification.

Chapter No. 12

(a). Write a note on lead accumulator with its discharge and recharging.

(b). Benzoic acid, C6H5COOH, is a week mono baric acid….(Unit 8)

Chapter No. 13

(a). NHS can be produced by heating together…..(Unit 1)

(b). What are enzymes? Explain how do they act as catalysts? Also give characteristics of enzyme catalyst

Chapter No. 14

(a). What is a galvanic cell? Give its composition & working of galvanic cell.

(b). Mg reacts with HCI to give hydrogen gas……..(Unit 1)

Chapter No. 15

 (a). Write a note on construction and working of bomb calorimeter. Describe bomb-calorimeter method for determination of enthalpy of reaction.

(b). What is an ideal gas? Real gases deviate more from ideal behavior at low temperature and under high pressure, explain.

Chapter No. 16

(a). Describe the electrolysis of molten sodium chloride & concentrated solution of sodium chloride

(b). Differentiate b/w isomorphism & polymorphism.

Chapter No. 17

(a). Define solubility. Explain solubility curve.

(b). What are cathode rays? How these rays are produced? Write their properties.

Chapter No. 18

(a). How are positive rays produced in discharge tube? Give properties of these raysa 2014, 2015

(b). What is mass spectrometer? How is it used to determine the relative atomic masses of isotopes?

Chapter No. 19

(a). Write characteristics of the catalyst. Also discuss types of catalyst.

(b). Write a note on catalysis. Distinguish b/w homogeneous and heterogeneous catalysis with suitable examples.

Chapter No. 20

(a). Define yield. How do we calculate the percentage Vield of a chemical reaction? Differentiate b/w actual and theoretical yield. Why actual yield is less than theoretical yield?

(b). What is electrochemical series? Give its any three applications.

Chapter No. 21

(a). What are liquid crystals? Give their three uses.

(b). What are azeotropic mixtures? What type of deviation is shown by them? Explain with the help of graph.

 

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