PPSC Subject Specialist Chemistry Paper

PPSC Subject Specialist Chemistry Paper

TIME ALLOWED:THREE HOURS TOTAL MARKS:100

PPSC Lecturer Past Papers & MCQs, SPSC Lecturer Past Papers & MCQs, FPSC Lecturer Past Papers & MCQs, KPPSC Lecturer Past Papers & MCQs, BPSC Lecturer Past Papers & MCQs, AJKPSC Lecturer Past Papers & MCQs. 

Note : Attempt five questions selecting at least one question from each section.

SECTION - 1

Q. No.1. Explain and define the following giving suitable examples Soft acid, Soft base, hard acid and hard base. Explain the various chemical phenomenon and reaction kinetics by applying soft and hard acid, base concept.        20

Q. No. 2

Discuss the important features of crystal field theory. Spell out its merits and explain the colour complexes obtained on the basis of this theory.        20

SECTION - 11

Q. No.3.  State the postulates of the Kinetics theory of gases and derive the kinetic equation: 

PV = 1/2 mnc2

Deduce 

(a) Boyl's law

(b) Charl's law

(C) Avogadro's law 

(d) Graham's law of diffusion, from Kinetic theory of gases

Q. No. 4. What is dipolemoment? How is it determined experimentally. Discuss the use of dipole-moment in determining the structure of simple organic and inorganic substances

SECTION - III

Q. No.5.  Explain the mechanism, Kinetics and Stereo-chemistry of SN, and SN, reactions.

Q. No. 6.  Explain the differences between :

(a) Resonance and Tautomerism

(b) Localized and delocalized bond

(c) Inductive effect and Resonance effect 

(d) Conjugation and hyper-conjugation                                        20

Q. No. 7.  Describe the principles of flame emission spectro-photometery and atomic absorption spectoro-photometery, compare them with respect to their sensitivity and interferences.      20