PPSC Lecturer Chemistry past paper 2022

The PPSC Lecturer Chemistry Paper of 2022 was a competitive exam conducted by the Punjab Public Service Commission (PPSC) for selecting qualified candidates for the role of Chemistry Lecturer in government colleges across Punjab. The exam covered a wide range of topics in chemistry, testing candidates’ knowledge in areas such as:

• General Chemistry Concepts: Fundamental concepts across physical, organic, and inorganic chemistry.
• Stoichiometry: Calculation-based questions involving chemical equations, molar relationships, and reaction yields.
• Organic Chemistry: Questions related to the structure, properties, and reactions of organic compounds.
• Inorganic Chemistry: Focused on the periodic table, coordination chemistry, and inorganic reaction mechanisms.
• Physical Chemistry: Topics such as thermodynamics, kinetics, and chemical equilibrium.
• Analytical Chemistry: Techniques and methodologies for chemical analysis and data interpretation.

1. The oxidation no. of carbon in Formaldehyde :

a. 0
b. 1
c. 2
d. 4

2. What will be the molarity of a solution having 10Kg NaCl dissolved in 100 litre:

a. 1M
b. 2M
c. 3M
d. none

3. Which of the following can not derivatized to osazone:

a. glucose
b. fructose
c. sucrose
d. lactose

4.Elements of periodic table of group 1 are called alkali metals because :

a. Their oxides are basic
b. Their hydroxides are soluble in water
c. They are present on earth crust
d. None

5. Which one is Co-polymer:

a. polyethene
b. polystyrene
c. polyvinylchloride
d. polyamide

6 What is formula of washing soda :

a. Na2CO3.10H2O
b.Na2CO3

c NaHCO3
d. NaOH

7.Normal pH of blood? :

a. 7.1
b. 7.35
c. 7.8
d.8.5

8.Which amino acid do not form alpha helix :

a. Valine
b. Proline
c. Tryptophan
d. Tyrosine

9. Hydrocarbons are the compounds of :

a. Carbon
b. carbon and hydrogen
c. carbon hydrogen and nitrogen
d. none

10.Which one is strong acid :

a. HF

b HCl
c. HBr

d HI

11. Osmotic pressure of plasma is :

a. 400 mmHg
b. 600mmHg
c. 800mmHg
d. 900mmHg

12.The cis trans isomers of but 2 ene are :

a. Structural isomers
b. Diastereomers
c. Enantiomers
d. None

13. The product supplied to cathode of fuel cell :

a. O2
b. Cl2
c. H2
d. none

14. What is added in Complexometric titration to stabilize product:

a. Salt
b. Preservative
c. Antioxidant
d. Buffer

15. Fe3O4 is :

a. paramagnetic
b. diamagnetic
c. ferromagnetic
d. ferrimagnetic

16.Electricity produced from polar crystal is called :

a. Piezo
b. pyroelectric
c. ferroelectric
d. ferrielectric

17. Solvent extraction depends upon which law :

a. Nernst distribution law
b. Law of mass action
c. law of conservation of energy
d. law of conservation of momentum

18 pH range of methyl orange indicator is. :

a. 1-2
b. 3-5
c. 8-9
d.11-12

19 Solvent extraction using small quantity is more. :

a. delayed
b. efficient
c. random
d. none

20.End point in reaction of Mn⁺⁷ to Mn⁺² :

a. pink to colorless
b. colorless to pink
c. colorless to black
d. black to colorless

21. Heisenberg uncertainty principle deals with which two things :

a. position and energy
b. energy and momentum
c. position and momentum
d. none

22. :Source of pollution in tanning of leather

a. Cr(VI)
c. Cr(III)
d. Cr(IV)

23. Strong hydrogen bonding with itself is formed by :

a. H2O
b. HF

c. HI
d.NH3

23. Saponification of fat is carried out by:

a. NaOH
b. KOH
c. Ca(OH)2
d. none

24. Number of peptide bonds in decapeptide :

a. 8
b. 9
c. 10
d.11

25. Pick up the Amphoteric oxide:

a. Ca(OH)2
b. CO2
c. Pb(OH)2
d. none

26. If ethyl bromide react with benzene in the presence of AlCl3, after several hours product
will be?

a. 1,2,5, triethyl benzene
b. 1,3,5, triethyl benzene
c. 2,4,6 triethyl benzene
d.1-ethyl benzene

27 Reaction of Ar-X with R-NH-R’ . :

a. Ammonium
b. Wittig
c. Diazonium
d. Tollens test

28 In Alkalimetric titrations standard solution is:

a. base
b. acid
c. indicator
d.buffer solution

29 Which chromatography has stationary phase less polar than mobile phase:

a. normal phase chromatography
b. reverse phase chromatography
c. HPLC
d.gas chromatography

30 :Liquid part of paint is commercialy referred as?

a. vehicle
b. binder
c. amalgum
d.both and b

31 Green house gas is :

a. CH4
b.N2
c. CH2=CH2
d.none

32 Which carbohydrate is present in milk only:

a. glucose
b. lactose
c. maltose
d.sucrose

33 Glucose absorption decreases due to :

a. Vitamin A
b. Vitamin B
c. Vitamin C
d. Vitamin D

34 The surface on which substance adsorb is :

a. adsobent
b. adsorbate
c. adsober
d.none

35 Study of branch related to solid state , thermodynamics, metallurgy, ceramics, with
synthesis and characterization of novel material is called

a. solid state chemistry
b. nanochemistry
c. nuclear chemistry
d. none

36 Exploit property of a crystal is :

a. M.P
b. B.P
c. Hardness
d.none

37 UNO was founded in :

a. 24 OCT 1945
b. 24 OCT 1946
c. 24 OCT 1947
d. 24 OCT 1949

38 Long walk of freedom is written by :

a.John Maceedy
b. Donald Trump
c.Nelson Mandela
d. Pervaiz Musharaf

39 One gallon =….liters :

a. 4.78541 liter
b. 3.78541 liters
c. 2.78541 liters
d.none

40 Length of suez canal :

a. 183km
b. 193km
c. 198km
d. none

41 Software used for presentation and communication :

a. Power point
b. Microsoft excel
c. Word pad
d.all

42 Software used for numerical problems :

a. Power point
b. Microsoft excel
c. Word pad
d.none

43Writer of Hayat e saadi :

a. Molana altaf hussain haali
b. Shaikh Saadi
c. Hemaira ahmad
d.Mirza ghalib

44 Calculate pH if OH^– conc is 10^-7 :

a. 8
b.7
c. 6
d.none

45 According to Bronsted-Lowry theory base is :

a. base is proton donor
b. base is proton acceptor
c. base is OH donor
d. base is OH acceptor

46 Entropy measure the amount of :

a. energy
b. disorder
c. momentum
d.none

47 Which is main law of photochemistry :

a. STARK Einstein law
b. Berin Tarrif Law
c. Hawks law
d.none

49 In uv/vis spectrophotometer the source of radiation is :

a. Iodine lamp
b. Tungsten filament
c. neon bulb
d. none

50 Goiter is caused by deficiency of

a. Bromine
b. Iodine
c. Salt
d. none

51 Maximum magnetic moment in low spin orbital complex of :

a. Co²⁺
b. Fe³⁺
c. Co³⁺
d.Cr²⁺

52 To extract Al, CN is used as masking agent. CN, tartyarate and….. can be used as
masking agent used is

a. EDTA
b. HCN
c. Tartaric acid
d. none

53 Current carried by a charge is called :

a. Columb number
b. Iodine number
c. Mark number
d. Amphere number

54 The movement of molecules from a region of higher concentration to a region of lower concentration :

a. active transport
b. osmosis
c. diffusion
d. none

55 Cyclobutadiene is :

a. aromatic
b. anti-aromatic
c. non aromatic
d. none

56 Which is incorrect about entropy :

a. It is a measure of randomness
b. Its is a path function
c. 2nd law of thermodynamics deals with entropy
d. 3rd law of thermodynamics deals with entropy

57 Choose the purines among the following :

a. C
b. T
c. U
d. A

58 Cholestrol is transferred to hepatic liver by :

a. LDL (Low-Density Lipoprotein)
b. HDL (High-Density Lipoprotein)
c. Chylomicrons
d.none

59 COO- accepts proton in acidic conditions, NH+3 donates H in basic condition…………. :

a. Plasma buffer
b. Protein buffer
c. homotactic buffer
d. none

60 Ozone is depleted by:

a. N2 gas
b. CFC’s
c. Ne gas
d. all

61 Optical rotation value of pure R isomer is 13.54. racemic mixture formed has optical rotation value 5.43, find percentage of
S

a. 29.95%
b. 45%
c. 87.6%
d.none

62 Optical isomers are identified by :

a. Visi
b. UV light
c. IR light
d.none

63 Which is unsaturated fatty acid :

a. palmitic
b. oelic acid
c. stearic
d. none

64 Which one is hexadentate ligand :

a. en
b. EDTA
c. NH3
d.oxalic acid

64 Solution whose concentration is known in titration is called :

a. titrand
b. titrant
c. buffer
d. none

65 Which one is important characteristic of a transition element :

a. variable oxidation state
b. color
c. metals
d. alloys

66 If initial concentration of reactants is 0.1M and K value is 0.716sec^-1. What is the order of reaction :

a. zero order reaction
b. first order reaction
c. second order reaction
d. cannot be predicted from given information

67 Number of lone pairs on oxygen in methanol :

a. 0
b. 1
c. 2
d.3

68 SN₂ gives reaction rapidly with :

a. primary alkyl halide
b. secondary alkyl halide
c. teritary alkyl halide
d.none

69 In ammonium nitrate fertilizer ,percentage of nitrogen present is :

a. 20%
b. 35%
c. 50%
d. 52%

70 Concentrated caustic soda is prepared in which cell?:

a. diaphram cell
b. castner and kelner cell
c. mercury cell
d. rochelle cell

71 setting time of cement can be delayed by adding :

a. calcium sulphate
b. calcium carbonate
c. magnesium sulpate
d. magnesium carbonate

72 Chromatography in which separation is based on size and geometry is called :

a. High Pressure Liquid Chromatography
b. size exclusion chromatography
c. gas chromatography
d. none

73 Synonym of PARANORMAL :

a. natural
b. super natural
c. monster
d. giant

74 Chemical equilibrium is a :

a. dynamic equilibrium
b. static equilibrium
c. random equilibrium
d. none

75 The sum of 5 consecutive even numbers is 740. The highest even no. is :

a. 180
b. 148
c. 152
d.132

76 Wave particle duality was given by which scientist :

a. Einstein
b. planks
c. Bohr
d. Heisenberg

77 Mohawra ” Gul khilana” means :

a. ulta kaam krna
b. gussa krna
c. tanz krna
d. none

78 Aboriginal synonym :

a. unanimous
b. native
c. gummy
d.tolerate