Provisional Management Services ETC-2016
Subject Chemistry (paper -1)
Note: Attempt five Questions All.
QNO 1:(a)
What is an electrode potential? How does it vary concentration of ions in solutions ?describe the calomel reference electrode and give the half cell reaction when it is coupled with standard hydrogen electrodes (14 marks)
(B) Expain the following (2+2+2=6 marks)
(1) gamma rays penetrate further into human body than either beta or alpha rays
(2) A nucleus weighs is less than the weights of neutron and proton
(3) In a nucleus explosion,a small has enormous destructive power.
QNO 02 (a)
State the first law of thermodynamics and writes it's mathematicall expression for the law.show thermodynamically that Cp-Cv=R
(15 marks)
(B)
Write a note on degeneracy and tunnel effects (5 marks )
QNO 03 (a)
What is meant by is isomerism and explain each with suitable example in relation to coordination compound (4×4=16 marks)
(1) Optical isomerism
(2) Geometrical isomerism
(3) Linkage isomerism
(4) Ionization isomerism
(b)
Explain colour and oxidation state of transition elements (4 marks )
QNO 04 (a)
Explain the salient features of VESPR theory and explain the following shapes of ICl3,XeF4,PCl5 and TCl4 by using this theory(12 marks)
(b) Use MOT to predict the bond order and number of unpaired electrons in O2 ions,O2,NO,CO
QNO 05 (a)
Describe briefly but clearly each of the following pollution problems.(15marks)
1 Acid rain
2 Carbon monoxide pollution
3 Lead pollution
(b)
What is mass defect and binding energy?( 5 marks)
Punjab Public Services commission
Provisional Management Services ETC
Subject Chemistry paper -2 2016
Note: Attempt five Questions All
QNO 01 (a) Explain with example the difference between following (5×4=20marks)
1 Inductive effect and Resonance effect
2:Choromophore and Auxochrome
3:Centre of symmetry and axis of symmetry
4:Resonance and tautomerism
(b)
QNO 02
(a) What beer Lambert law and also explain its limitations.(3+2=5 Marks)
(b) What a brief note on five applications of UV spectroscopy (10marks )
(c) What bathochronic shift and hypsochromic shift. (5 marks)
QNO 03
(a) Discuss the mechanism of following. (5×3=15 marks )
1: Clemenson and wolf kichner reaction
2: Resomund Reaction
3:Canzarro Reaction
(b) state the chemical test of aldehyde and ketone (5 marks)
QNO 04
(a) What is steroismersim and write its all types with one one example (14 marks)
(b) What is hydrogen binding and give its applications. (6 marks)
QNO 05
(a) Explain the Arenium ions stability with the hepl resonance contributing structure. (10 marks)
(b)
What is fridal craft reaction and explain its types and limitations (10 marks)
QNO 06
(a)
What is column chromatography and what are it's applications (8 marks)
(b) Define the following terms. (2×6=12 marks)
1: Zwitterions
2: Absorbtion chromatography
3: Retention factor
4: Polysaccharides
5: Condensation polymerization
6: Liquid Crystals
QNO 07
Briefly explain the following terms (4×5=20 marks)
1: function of protein
2: Classification of carbohydrate
3: P-type and N-type semi conductors
4: Detergents and it's applications
Comments
Post a Comment