Federal Public Service Commission (FPSC)
Competitive Examination for Recruitment to BPS-17 Posts under the Federal Government
Time Allowed: 3 Hours
MAXIMUM MARKS: 100 Marks
CHEMISTRY, PAPER-I
PART-II
Attempt FIVE questions in all, Including Questions No.1 which is COMPULSORY, All questions carry EQUAL marks.
Q. 2. (a) Consider an infinitely long cylindrical insulating shell of inner radius
a, and outer radius b, and has a uniform volume charge density ρ. If a
line of charge density λ is placed along the axis of the shell then
determine the electric field intensity at a point r such that (i) a < r < b
and (ii) r > b. (8)
(b) Determine the energy density for a capacitor. (6)
(c) Discuss the Lorentz force. (6)
(20)
Q. 3. (a) Find the magnetic energy density for the magnetic field of the inductor.
(b) Sate and explain the Lenz’s law.
(c) Why is the work done by a magnetic field on a charged particle always
zero?
Q. 4. (a) Describe the properties of each of, an electron and the light, that show
their dual nature.
(b) State and explain the de Broglie hypothesis?
(c) Metals A, B and C have work functions 2.2eV, 3.6eV and 4.8eV. If a
light of wavelength 320nm is incident on these, then find
(i) Which metals exhibit photoelectric effect?
(ii) Maximum kinetic energy of photoelectron in each case?
Q. 5. (a) Determine the transmission co-efficient for a particle having energy E
incident on a rectangular barrier, so that E < V0, the barrier is given by
V(x) = { +V0 for − a < x < a
0 for |x| > a
(b) For an operator  , we know [Ĥ, Â] = 0, where Ĥ is the Hamiltonian
operator, what can we conclude about the eigen states of  and the 〈Â〉?
(c) Give two examples for the operator Â, given in part (b) above.
CHEMISTRY, PAPER-II
Attempt FIVE questions in all, Including Questions No.1 which is COMPULSORY, All questions carry EQUAL marks.
PART-II
Q. 2. Define the following terms and give suitable examples (4 each)
(i) Aromaticity
(ii) Conjugation
(iii) Inductive effect
(iv) Imine-enamine Tautomerism
(v) Intra molecular Hydrogen Bonding
(20)
Q. 3. Write down Preparations of Alkanes and Aldehydes. Also give specific example of
addition reactions of alkenes with special reference to Markonikav and anti
Markonikav rule.
(20)
Q. 4. (a) Starting from acetylene how you can prepare 1-Octyne.
(b) Write down the condition for the conversion of 2-Octyne to cis 2-Octene.
(10)
(10) (20)
Q. 5. Write the structural formula of your choice for all the structural isomers with the
molecular formula C4H6. Also explain cis, trans, E,Z and syn, anti geometrical
isomerism.
(20)
Q. 6. Phenol is more acidic than methylalcohol. Explain in detail. Also draw resonating
structures of phenoxide ion.
(20)
Q. 7. (a) Describe the instrumentation of IR spectrophotometer in detail.
(b) What are the basic Principals of IR Spectroscopy?
(15)
(05) (20)
Q. 8. (a) What is chemical shift? What are the factors effecting chemical shift?
(b) Describe the instrumentation of NMR spectroscopy.?
(10)
(10) (20)
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