Thursday, January 27, 2022
07:50 AM (GMT +5)

 CSS Forums Chemistry Papers 2017

#1
Friday, February 24, 2017
 Royal Queen of Literature Join Date: May 2005 Location: Forest of Fallen Stars Posts: 7,585 Thanks: 2,425 Thanked 15,843 Times in 5,005 Posts
Chemistry Papers 2017

FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION - 2017
FOR RECRUITMENT TO POST IN BS - 17
UNDER THE FEDERAL GOVERNMENT

CHEMISTRY, PAPER - I

TIME ALLOWED: THREE HOURS
PART - I (MCQs): MAXIMUM 30 MINUTES
PART - I (MCQs): MAXIMUM MARKS = 20
PART - II MAXIMUM MARKS = 80

NOTE:
(i) Part - II is to be attempted on the separate Answer Book.
(ii) Attempt ONLY FOUR questions from PART - II. ALL questions carry EQUAL marks.
(iii) All the parts (if any) of each Question must be attempted at one place instead of at different places.
(iv) Candidate must write Q. No. in the Answer Book in Accordance with Q. No. in the Q. Paper.
(v) No Page / Space be left blank between the answers. All the blank pages of Answer Book must be crossed.
(iv) Extra attempt of any question or any part of the attempted question will not be considered.

PART - II

Q. 2 (a) Derive Schrodinger wave equation for motion of a particle in one dimensional box. (10)
(b) Solve Schrodinger wave equation to find the expression for wave function energy of a particle in one dimensional box. (6)
(c) What is Eigen function and Eigen value? Give examples. (4)

Q. 3 (a) Define heat capacities and molar heat capacities. Prove that Cp-Cv=R for ideal gases. (10)
(b) What is Gibbs energy? Derive a relation between standard Gibbs energy change and equilibrium constant. (6)
(c) Differentiate spontaneous and non spontaneous process. (4)

Q. 4 (a) State and explain Kohlrausch's law. Give its applications. (10)
(b) What is meant by standard deviation? Give its significance in analytical chemistry. (6)
(c) Briefly describe conductometric titrations. (4)

Q. 5 (a) Discuss the effect of temperature on rate of chemical reaction on the basis of Arrhenius equation. How can you determine activation energy and pre-exponential factor for a chemical reaction using Arrhenius equation? (10)
(b) Derive kinetic equation for 1st order reaction. (6)
(c) Prove that half like period for 1st order reaction is independent of initial concentration of reactant. (4)

Q. 6 (a) What is adsorption isotherm? Derive Langmuir adsorption isotherm for adsorption of a gas on solid surface. (10)
(b) What is enzyme catalysis? Discuss its kinetics. (6)
(c) What are surfactants? Give their properties. (4)

Q. 7 (a) What is electrophoresis? Give its principle and discuss its applications in biochemistry. (10)
(b) Give six chemical properties of nitrogen. (6)
(c) What is Common ions effect? Give its applications. (4)

Q. 8 (a) State John-Teller theorem. Explain it using suitable examples from coordination complexes. (10)
(b) Give postulates of Werner's theory of coordination complexes. (6)
(c) Briefly describe nuclear decay rate law for disintegration of radioactive elements. (4)
__________________
The Me you have always known, the Me that's a stranger still.
 The Following User Says Thank You to Last Island For This Useful Post: Roqayyah (Friday, February 24, 2017)
#2
Friday, February 24, 2017
 Royal Queen of Literature Join Date: May 2005 Location: Forest of Fallen Stars Posts: 7,585 Thanks: 2,425 Thanked 15,843 Times in 5,005 Posts

FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION - 2017
FOR RECRUITMENT TO POST IN BS - 17
UNDER THE FEDERAL GOVERNMENT

CHEMISTRY, PAPER - II

TIME ALLOWED: THREE HOURS
PART - I (MCQs): MAXIMUM 30 MINUTES
PART - I (MCQs): MAXIMUM MARKS = 20
PART - II MAXIMUM MARKS = 80

NOTE:
(i) Part - II is to be attempted on the separate Answer Book.
(ii) Attempt ONLY FOUR questions from PART - II. ALL questions carry EQUAL marks.
(iii) All the parts (if any) of each Question must be attempted at one place instead of at different places.
(iv) Candidate must write Q. No. in the Answer Book in Accordance with Q. No. in the Q. Paper.
(v) No Page / Space be left blank between the answers. All the blank pages of Answer Book must be crossed.
(iv) Extra attempt of any question or any part of the attempted question will not be considered.

PART - II

Q. 2 Write brief notes on the following: (2 each) (20)
1. Covalent Bond
2. Hybridization
3. Isomerism
4. Monosaccharides
5. Triglycerides
6. Electronegativity
7. The Inductive Effect
8. Chemical Shift
9. Stereoselectivity
10. Fertilizers

Q. 3 (a) Give a method of synthesis of the following compounds from an appropriate alkene of your choice with reagents. (12)

(b) Write the Major product for these Reactions. (8)

*************************

Q. 4 (a) What is aromaticity? Explain the Huckel criteria for aromaticity. (6)
(b) Write names of the following compounds. (4)

(c) Write the reaction and mechanism of Friedel Craft alkylation and acylation reaction. (10)

*************************

Q. 5 (a) What is Grignard reagent? What are its applications? How would you prepare Grignard reagent starting from an alkyl halide of your choice? (8)
(b) Give the product of the following reactions: (3)

(c) Give the IUPAC nomeclature of Aldehydes and Ketonese. (4)
(d) Give the major products of the following reactions. (5)

*************************

Q. 6 (a) What is stereoisomerism? Give an account of different types of stereoisomerism. (5)
(b) Assign an R or S configuration to the chiral center in each molecule. (9)

(c) In the following molecules identify that which are diastereomers and which are enantiomers? (6)

*************************

Q. 7 (a) What is the difference between Dispersive IR Spectrometer and Fourier Transform (FT)-IR Spectrometer. (5)
(b) Differentiate the following on the basis of IR. (3)

(c) Differentiate the following pairs of compounds on the basis of UV. (8)

(d) Deduce the structure of the product of the given reaction from the following data. (4)

*************************

Q. 8 Write notes on any FOUR of the following (5 each) (20)
(a) Reactions of Monosaccharides
(b) Biosynthesis of Cholesterol
(c) Primary structure of Polypeptides and Protein
(d) Prostaglandins
(e) Synthesis of Peptides
__________________
The Me you have always known, the Me that's a stranger still.
 The Following User Says Thank You to Last Island For This Useful Post: Roqayyah (Friday, February 24, 2017)