PPSC Lecturer Chemistry Paper 2017

The PPSC Lecturer Chemistry Paper of 2017 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. pH of human blood is :

a. 7
b. 7.35
c. 7.85
d. 6.78

2. The radius of third shell of hydrogen is:

a. 5.716A⁰
b. 6.716A⁰
c. 3.716A⁰
d. 4.716A⁰

3. Which of the following show hydrogen bonding:

a. C2H5Cl
b. C2H6
c. CH3-O-CH3
d. C2H5OH

4. the substance that absorb light in the visible region of spectrum

a. is always colored
b. can absorb a wavelength of 380nm
c. may or maynot be colored
d. can absorb a wavelength of 390nm

5. Ksp for sparingly soluble salt Bi₂S₃ is:

a. (Bi²⁺) (S^3-)²
b. (Bi²⁺)³ (S^3-)²
c. (Bi³⁺)² (S^2-)³
d. none

6. Optimum value of DO :

a. 6mg/cm3
b. 4-6mg/m3
c. 6mg/dm3
d. 4-6mg/ml

7. The mass of one mole of electron is:

a. 1.006mg
b. 0.55mg
c. 1.67mg
d. 0.184mg

8. Instantaneous dipole induced dipole force is called:

a. hydrogen bonding
b. london dispersion forces
c. van der waals forces
d. debye forces

9. A solution havinh OH- = 10-9. Its pH will be:

a. 5
b. 3
c. 4
d. 6

10. In super oxide, the oxidation state of oxygen is:

a. -1
b 0
c. -2
d. -1/2

11. The chemical formula of sodium nitroprusside is:

a. Na₂[Fe(CN)₅NO]
b. Na[Fe(CN)₅NO]
c. Na₂[Fe(CN)₅NO₂]
d. none

12. Which of following form of coal has highest% of carbon:

a. peat
b. bituminous
c. lignite
d. anthracite

13. Unsaturated nature of alkene can be detected by :

a. decolorization of KMnO4
b. decolorization of Br2 in CCl4
c. ozonolysis
d. all

14. Gravimetric analysis does not involve of the following process:

a. digesting
b. titrating
c. washing
d. precipitating

15. During the nitration of benzene, the active nitrating agent is:

a. NO2⁺
b. NO2
c. NO3
d. HNO₃

16. Which of the following reagent may not be used for oxidation of aldehyde to organic acid:

a. Ag(NH3)2
b. KMnO4
c. LiAlH4
d. K2Cr2O7

17. The number of vibrational degree of freedom for CO2 is:

a. 3
b. 4
c. 8
d. 5

18. Mild oxidizing agent among following is:

a. K2Cr2O7
b. KMnO4
c. Ag2CrO4
d. Ammonical AgNO3

19. Buffer solution can be explained by:

a. law of mass action
b. common ion effect
c. Le-chatlier principle
d. all

20. Which of following aldehyde is used to prepare urotropine medicine:

a. benzaldehyde
b. acetone
c. formaldehyde
d. ethyl alcohol

21. The reaction of pyrrole with CHCl3 in the presence of alkali is:

a. Friedal craft reaction
b. Sandmeyer reaction
c. Hofmann reaction
d. Rimer tiemann formylation

22. The shift of absorption of light towards higher wavelength:

a. bathochromic shift
b. auxochromic shift
c. hypochromic shift
d. none

23. An example of AX₄E₂ type of compound is:

a. AsF4
b. BF3
c. XeF4
d. ICl4

24. Which of the following has lowest oxidation state for central atom:

a. K₃[Fe(CN)₆]
b. K₄[Fe(CN)₆]
c. K₂[Fe(CN)₆]
d. all have same

25. The solubility product of AgCl at 298K is:

a. 5.4*10¹³
b.8.4*10¹⁵
c. 1.8*10^-10
d. none

26. The component of soda ash is:

a. anhydrous Na2CO3.
b. Na2CO3.10H2O
c. Na2CO3.H2O
d. Na2CO3. 5H2O

27.The formula of Mohr’s salt is :

a. FeSO4(NH4)SO4.5H2O
b. FeSO4(NH4)SO4.6H2O
c. FeSO4(NH4)SO4.10H2O
d. FeSO4.10H2O

28. Chili saltpeter has formula:

a. NaNO2
b. NaNO3
c. KNO3
d. Na2B4O7

29. The d orbital is involved in sp3d hybridization?

a. d_xy
b. d_x
c. d_xz
d. d_z²

30. The expression for root mean square velocity is :

a. C_rms = (3RT/M)^1/2
b. C_rms = (3p/d)^1/2
c. C_rms = (3PV/M)^1/2
d. all

31. One calorie is equal to how many joules

a. 0.4184J
b. 41.84J
c. 4.184J
d. none

32. The molarity of solution containing 10g of NaOH dissolved per dm3 of solution is:

a. 0.25M
b. 0.5M
c. 1M
d. 2M

33. Which technique is used to determine the absorption of radiation:

a. dilatometric method
b. optical rotation method
c. spectrometry
d. refractometric method

34. A large molecule built up by the collection of small simple chemical units is called:

a. carbohydrates
b. lipids
c. enzymes
d. polymers

35. A mixture of benzene and toulene forms

a. azeotropic mixture
b. suspension
c. nearly ideal solution
d. non ideal solution

36. Benzene cannot undergo:

a. addition reaction
b. substitution reaction
c. oxidation reaction
d. elimination reaction

37. CaMg₃(SiO₃)₄ is composition of :

a. Calcite
b. Asbestos
c. dolomite
d. talc

38. Which of the following is a basic component of smog:

a. CFCs
b. PAN
c. PBN
d. all

39. The number of peaks observed in mass spectrometry shows:

a. mass of isotopes
b. no of isotopes
c. charge of isotopes
d. relative abundance of isotopes

40. A real gas obeying van der waal equation will resemble ideal gas if:

a. both a and b are small
b. both a and b are large
c. a is small and b is large
d. a is large and b is small

41. A perfect crystal at 0K has:

a. zero enthalpy
b. zero entropy
c. maximum enthalpy
d. maximum entropy

42. Splitting of spectral lines when atoms are subjected to strong magnetic field is called:

a. compton effect
b. stark effect
c. zeeman effect
d. photoelectric effect

43. Which of following is a weaker base:

a. ammonia
b. pyridine
c. pyrrole
d. aniline

44. Which is the sequence of regions of electromagnetic spectrum:

a. cosmic rays, X rays, visible and UV
b. micro,X rays, visible and UV
c. UV,cosmic rays, X rays, visible
d. visible,UV, Xray and cosmic rays

45. AX₂E type compounds are:

a. non polar
b. V-shaped
c. T-shapes
d. triangular planar

46. The value of e/m ratio of electron is ……C/kg:

a. 1.7588*10^-11
b. 1.7588*10¹¹
c. 9.109*10^-31
d. none

47. Crystalline solids dont have

a. characteristics geometry
b. compressibility
c. rigidity
d. all

48. German silver is alloy of :

a. Ni Zn Te
b. Ni Zn Fe
c. Cu Zn Fe
d. Cu Zn Ni

49. The radioactive isotopes used for testing deep-scated cancer growth is:

a. I-131
b. P-30
c. Co-60
d. P-32

50. The mass of one alpha particle is:

a. four times than that of H atom
b. four times the mass of one amu
c. four times 0.166*10^-26kg
d. all

51. Ti[(H2O)6]⁺³ tansmits

a. yellow and red light
b. red and white light
c. yellow and blue light
d. red and blue light

52. Which of following amino acid is basic in nature:

a. glycine
b. lysine
c. alanine
d. glutamic

53. Which of following pair has same electronic configuration as possessed by neon:

a. KCl
b. NaCl
c. NaMg
d. NaF

54 What is the %age of nitrogen in NH4NO3:

a. 30%
b. 35%
c. 40%
d. none

55. Which set of hybrid orbital has square planar shape:

a. sp3
b. dsp2
c. dsp3
d. d2sp3

56. Nitration of toulene takes place at:

a. ortho position
b. para position
c. both a and b
d. meta position

57. Sn1 reaction proceeds via the formation of :

a. carbocation
b. free radicals
c. carbanion
d. transition state

58. Which metal is used in the thermite process because of its activity:

a. Fe
b. Cu
c. Al
d. Zn

59. Hydrolysis reaction of fats by caustic soda is known as:

a. saponification
b. acetylation
c. carbonylation
d. esterification

60. Which enthalpy change is not used in Born Haber cycle:

a. H_f
b. H_at
c. H_i
d. H_com

61. The example of primary standard is:

a. benzoic acid
b. KOH
c. NaOH
d. H2SO4

62. Group VI B of transition element contain:

a. Mn Te Re
b. Mn Yt W
c. Cr Mo W
d. none

63. The technique that involves the study of absorption of radiant energy(in UV and visble region) by neutral atoms in the gaseous state is called :

a. atomic emission spectroscopy
b. atomic absorption spectroscopy
c. flame spectroscopy
d. nuclear magnetic resonance spectroscopy

64. The derivatives of perhydrocyclopentanophenanthrene is called:

a. phospholipids
b. steroids
c. proteins
d. nucleic acids

65. Bakelite is obtained from phenol by reaction with

a. chlorobenzene
b. aceton
c. acetaldehyde
d. formaldehyde

66. The atomicity of one molecule of haemoglobin is:

a. 10,000
b. 107,00
c. 60,000
d. 10,0000

67. What is the relationship betwen Cp and Cv:

a. Cp – Cv = R
b. Cp + Cv = R
c. Cp + Cv = 2R
d. Cp – Cv = 2R

68. How many moles of sodium are present in 0.1g of sodium:

a. 4.03*10^-3
b. 4.03*10^-5
c. 4.03*10^-6
d. none

69. Vinyl benzene is also called:

a. styrene
b. cumene
c. allene
d. n-butyl chloride

70. Which of following is not able to denature the alcohol:

a. acetone
b. methanol
c. pyridine
d. lactic acid

71. Which of following is an example of copolymer:

a. polyamide
b. polyvinyl acetate
c. polystyrene
d. poly vinyl chloride

72. Which of following has smallest radius:

a. Na¹⁺
b. Mg²⁺
c. Al³⁺
d. Si⁴⁺

73. Order of reactivity of alkene with hydrogen halide is:

a. HF>HBr>HI
b. HI>HBr>HCl
c. HI>HCl>HBr
d. none

74. Which of the following has maximum vapor pressure:

a. HCl
b. HBr
c. HI
d. HF

75. The chemical formula of picric acid is:

a. C6H3N3O7
b. C5H3N3O7
c. C6H3N3O8
d. none

76. The chemical name of artificial milk is :

a. SnOCl
b. CaOCl
c. BiOCl
d. none

77. The value of Bohr magneton is:

a. 9.27*10^-21 ergs/G
b. 9.27*10^-23 ergs/G
c. 92.7*10^-21 ergs/G
d. none

78 Urdu was declared as national language of pakistan in

a. april 1950
b. june 1955
c. april 1954
d. june 1952

79. How many letters are there in urdu alphabets:

a. 35
b. 36
c. 37
d. 39

80. In MS word 2007, which shortcut key is used to increase left indent:

a. Ctrl + L
b. Ctrl + M
c. Ctrl + 1
d. F10

81. Who composed the verses of national anthem:

a. Hafeez Jallandri
b. Nasir Kazmi
c. Allama Iqbal
d. Faiz ahmad faiz

82. Cost of a vest after 15% discount is 102.What is the cost of the vest before discount:

a. 117
b. 120
c. 116
d. 121

83. Complete the number series:

a. 70
b. 57
c. 63
d. 75

84. All of the following cause security risks and possible violation of privacy except:

a. Identity theft
b. viruses
c. Hackers
d. Spam

85. People speak english all over the world:

a. English is spoken by people all over the world
b. English was spoken by people all over the world
c. English is spoke by people all over the world
d. English has been spoken by people all over the world

86. I …..upon his privacy:

a. intruded
b. approached
c. violate
d. counted

87. There are ….members of SAARC:

a. 6
b. 7
c. 5
d. 8

88. Fill in the blanks The cupboard was …big…fit through the door:

a. too/to
b. more/than
c. more/then
d. so that

89. If a metal can be drawn into wires easily:

a. ductile
b. malleable
c. extractive
d. tackle

90. Land of dessert is the popular name of:

a. Scotland
b. Egypt
c. Africa
d. Marryland

91. Plants primarily get their nitrogen from:

a. atmosphere
b. rain
c. soil
d. none

92. Who is is the minister of overseas Pakistanis in the Government:

a. Hussain Shah Rashidi
b. Pir Sadruddin Rashidi
c. Birjees Tahir
d. Kamran Michael

93. Which country is the largest producer of shale gas:

a. Iran
b. USA
c. Russia
d. Sweden

94. Nobel prize winner in literature , Nadine Gordimar, belonged to:

a. Brazil
b. UK
c. South Africa
d. none

95. Which amendment of 1973 constitution enhanced the powers of President substantially including power to dissolve the National assembly if condition in the country didnot permit functioning of the Federal government:

a. 8th
b. 13th
c. 17th
d. 18th

96. Quaid e azam resigned from the membership of congress in:

a. 1913
b. 1916
c. 1920
d. 1922

97. NAme the director general of inter o service public relations ISPR:

a. Lt Gen Aslam Bajwa
b. Maj Gen Asif Ghafoor
c. Maj Gen Suhail Khan
d. none

98. The first rocket launched by Pakistan was:

a. Ghuri
b. Ghaznavi
c. Rahbar
d. Badar

99. Which of following bodies of United Nation deals with refuges issues :

a. UNHCR
b. OHCHR
c. UNESCO
d. UNITAR

100. Who is the current governor of State Bank:

a. Asif wathra
b. Tariq bajwa
c. ishrat hussain
d. none