Chemistry Punjab PMS Paper I 2022

PUNJAB PUBLIC SERVICE COMMISSION
COMBINED COMPETITIVE EXAMINATION
FOR RECRUITMENT TO THE POSTS OF
PROVINCIAL MANAGEMENT SERVICE, ETC-2022
CASE NO. 2C2023
SUBJECT: CHEMISTRY (PAPER-I)
TIME ALLOWED: THREE HOURS MAXIMUM MARKS: 100
NOTE:
i. All the parts (if any) of each Question must be attempted at one place instead of at different places.
ii. Write Q. No. in the Answer Book in accordance with Q. No. in the Q. Paper.
iii. 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 question will not be considered.
NOTE: Attempt Any FIVE Questions. All Questions Carry Equal Marks. Attempt in English or Urdu.
Q No. 1: Write brief note on the following: (6+7+7=20 Marks)
a) Photoelectric effect b) Compton Effect c) De Broglie Wavelength
Q No. 2: a) Explain the entropy change in reversible and irreversible processes.
b) Describe the applications of Gibbs free energy as useful work.
(12+8=20 Marks)
Q No. 3: a) Briefly describe the Debye-Huckel theory and its applications for strong electrolytes.
(15+2=17 Marks)
b) Justify how Galvanic cell or Daniel cell is reversible one? (3 Marks)
Q No. 4: a) Describe the non-integrating type ionization chamber for measuring the radioactivity.
b) Explain nuclear fusion reaction. Give examples.
(12+8=20 Marks)
Q No. 5: a) Elaborate the rules/principles for filling electrons in the orbitals with the help of suitable examples. (8 Marks)
b) How will you compare VBT with MOT? (5+5=10 Marks)
c) Write down the postulates of VSEPR theory. (2 Marks)
Q No. 6: a) Describe the similarities and dissimilarities of valance bond and molecular orbital theories.
b) What are the applications of chelates compounds?
(12+8=20 Marks)
Q No. 7: a) Discuss the process of manufacture of urea with flow sheet diagram.
b) Compare wet and dry processes of Cement Industry. What are their advantages and disadvantages? (10+10=20 Marks)
Q No. 8: a) Explain, how acid rain and smog pollute the environment?
b) What is the role of ozone on the environment?
(12+8=20 Marks)