Solved Past Paper
SPSC Lecturer Chemistry Past Paper 14 March 2013
Practice and review SPSC Lecturer Chemistry Past Paper 14 March 2013 with verified questions, correct answer keys, and detailed solutions.
Total Questions
50 Qs
Duration Limit
100 Min
Negative Mark
0.00
Attempt Count
0
Solved Questions & Explanations
50 questions with verified answers and explanations
1
The numerical value of R in ergs K⁻¹mol⁻¹:
Green Chemistry Principles
PYQ
a
1.587
b
2.314
c
0.0821
d
8.314 x 10⁷
Also appeared in
2
Bohr model defines angular momentum as l=nh/2π, but in Schroedinger wave mechanics it is = ?
Schr_dinger Wave Equation
PYQ
a
A sin 2π vt
b
g' V/4k²
c
√[l(l + 1)] h/2π
d
h/λ
Also appeared in
3
Axial lengths and inter axial angles of unit cell of crystals are known as:
Elevation of Boiling Point and Depression of Freezing Point
PYQ
a
Lattice points
b
Lattice constants
c
Lattice planes
d
Miller indices
Also appeared in
4
If the wavelength of a photon is doubled:
Entropy and Gibbs Free Energy
PYQ
a
The energy is doubled
b
The frequency is doubled
c
The energy is reduced by a factor of ½
d
The frequency remains same
Also appeared in
5
When ethanamide is treated with phosphorus pentoxide it forms:
Green Chemistry Principles
PYQ
a
Carbamide
b
Ammonium phosphate
c
Propionamide
d
Methyl cyanide
Also appeared in
6
What is the total number of π bonds found in the following compound: H-C≡C-CH₂-KO₂=:
Valence Bond Theory
PYQ
a
1
b
2
c
3
d
4
Also appeared in
7
If gram molecular weight of gas is 32 g its density will be:
VSEPR Theory and Molecular Geometry
PYQ
a
1.43 g/l
b
1.88 g/l
c
2.15 g/l
d
3.2 g/l
Also appeared in
8
When H⁺ ion concentration of solution is 1 x 10⁻⁵ pH of that solution will be:
Concentration Units
PYQ
a
5
b
8
c
10
d
13
Also appeared in
9
Which one of the following principal quantum numbers has largest s orbital?
Quantum Numbers and Atomic Orbitals
PYQ
a
n=1
b
n=2
c
n=3
d
n=4
Also appeared in
10
What would be the transmittance implied for spectrophotometrics at 0.25 absorbance?
Green Chemistry Principles
PYQ
a
0.75 T
b
0.56 T
c
0.65 T
d
0.85 T
Also appeared in
11
Which one of the following has no dipole moment:
Green Chemistry Principles
PYQ
a
cis 1,2-dichloroethene
b
1,1-dichloroethane
c
Trans 1,2-dichloroethene
d
Trichloroethene
Also appeared in
12
Lord Mountbatten replaced _______ as viceroy of India in 1947?
Schrödinger Wave Equation
PYQ
a
Lord Wavell
b
Lord Chelmsford
c
Lord Curzon
d
None of these
Also appeared in
13
Which of the following bonds would show the strongest absorption in the IR?
Nitrogen and Oxygen Families
PYQ
a
Carbon-hydrogen
b
Oxygen-hydrogen
c
Nitrogen-hydrogen
d
Sulfur-hydrogen
Also appeared in
14
When a nucleophilicity of a nucleophile, joined to an atom is found greater than expected is known as _______ effect.
Effective Nuclear Charge and Shielding Effect
PYQ
a
Alpha
b
Beta
c
Gamma
d
Sigma
Also appeared in
15
The source of electromagnetic radiation which is used in the instrument atomic absorption spectrophotometer is:
Atomic Absorption Spectroscopy (AAS)
PYQ
a
Xenon lamp
b
Hollow cathode lamp
c
Deuterium lamp
d
Tungsten lamp
Also appeared in
16
Which one among the following pairs cannot be separated by H₂S in dil. HCl?
Rate Laws and Order of Reaction
PYQ
a
Bi³⁺, Sn²⁺
b
Al³⁺, Hg²⁺
c
Zn²⁺, Cu²⁺
d
Ni²⁺, Cu²⁺
Also appeared in
17
If analysts are measuring chloride contents in water in four different Laboratories. If known (Accepted) value of chloride is 105mg/L then the results obtained in _____ laboratory have low accuracy and high precision;
Errors, Precision, and Accuracy
PYQ
a
102.1 mg/L 103 mg/L 102.7 mg/L 101.5 mg/L
b
85.8 mg/L 86.7 mg/L 88.85 mg/L 87 mg/L
c
90.35 mg/L 97.2 mg/L 99.5 mg/L 94.7 mg/L
d
107.5 mg/L 105 mg/L 109 mg/L 110.5 mg/L
Also appeared in
18
A system attains equilibrium when ΔG is:
Spontaneity and Equilibrium
PYQ
a
Zero
b
Negative and large
c
Negative and small
d
Positive and large
Also appeared in
19
Which of the following is an organ-metallic compound?
Green Chemistry Principles
PYQ
a
Fe (CO)₅
b
Pb(NO₃)₂
c
LiN (CH₃)₂
d
Pb (C₂H₅)₄
Also appeared in
20
Raman spectra may be obtained in:
Atomic Spectra and Line Spectra
PYQ
a
IR & Visible region
b
Microwave region
c
IR and Microwave region
d
UV & Visible region
Also appeared in
21
A bottle of dilute hydrochloric acid is 2M. What mass of hydrogen chloride, HCl, would be dissolved in 100cm³ of this acid?
Hydrogen Bonding and van der Waals Forces
PYQ
a
3.65g in 100 cm³
b
36.5g in 100 cm³
c
7.3g in 100 cm³
d
3.7g in 100 cm³
Also appeared in
22
A well stoppered thermos flask contain some ice cubes. This is an example of:
Maxwell Relations and Thermodynamic Identities
PYQ
a
Closed system
b
Open system
c
Isolated system
d
Non-thermodynamic system
Also appeared in
23
Enthalpy of reaction is same whether the reaction takes place in one or several steps. This is known as:
Krebs Cycle (TCA Cycle)
PYQ
a
Hess's Law
b
Born-Haber cycle
c
Born-Mayer Law
d
2ⁿᵈ Law of Thermodynamics
Also appeared in
24
The Governor-General Ghulam Muhammad dissolved the Constituent Assembly on:
Indus Valley Civilization
PYQ
a
26 October 1954
b
24 October 1954
c
25 October, 1955
d
20 April, 1958
Also appeared in
25
In general formula for alkanes (CₙH₂ₙ₊₂), +2 stands for:
Valence Bond Theory
PYQ
a
2 hydrogen atoms
b
2 carbon atoms
c
2 single bonds
d
2 methyl groups
Also appeared in
26
Teflon is a polymer of ______ monomer.
Polymer Chemistry and Plastics
PYQ
a
Monofluoroethylene
b
Difluoroethane
c
Trifluoroethane
d
Tetrafluoroethylene
Also appeared in
27
The element having valence shell electronic configuration as 3s², 3p⁴ that belongs to:
Electronic Configuration and Term Symbols
PYQ
a
Fourth period, VA group
b
5ᵗʰ period, IIIA group
c
3ʳᵈ period, VIA group
d
2ⁿᵈ period VIA group
Also appeared in
28
Which of the following is not a member of the transition metal:
Boron Family and Carbon Family
PYQ
a
The scandium family
b
The titanium family
c
the iron family
d
the beryllium family
Also appeared in
29
The correct order of spectral regions with respect to increasing frequency is:
Atomic Spectra and Line Spectra
PYQ
a
HV, VIS, IR, RF
b
RF, IR, VIS, UV
c
UV, VIS, RF, IR
d
VIS, RF, IR, UV
Also appeared in
30
Which of the following atom has the greatest tendency to capture an additional electron:
Ionization Energy and Electron Affinity
PYQ
a
F
b
Na
c
Cl
d
S
Also appeared in
31
IUPAC name of Mesitylene is:
World Leaders in News
PYQ
a
1,3,5-trimethylbenzene
b
1,2,-trimethylbenzene
c
1,3,5-triethylamine
d
1,3,5-benzoic acid
Also appeared in
32
What type of sample cuvette should be used for measuring the absorbance of a molecule at 220 nm?
Green Chemistry Principles
PYQ
a
KBr or NaCl
b
Glass
c
Plastic
d
Quartz
Also appeared in
33
Which of the following process does not use a catalyst?
Haber Process and Ammonia Manufacture
PYQ
a
Haber process
b
Contact process
c
Thermal process
d
Ostwald process
Also appeared in
34
At the same temperature and pressure two identical balloons were separately filled with oxygen and hydrogen. If O₂ escaped at the rate of 100ml per second the hydrogen will escape at rate of:
Second Law of Thermodynamics
PYQ
a
80 ml per second
b
150 ml per second
c
200 ml per second
d
800ml per second
Also appeared in
35
Mechanism for the emission of β⁻-particle from nucleus is that in which:
Ionization Energy and Electron Affinity
PYQ
a
Proton is changed into neutron
b
Electron is emitted from s shell
c
Neutron is changed into proton
d
Positron is changed into electron
Also appeared in
36
The kinetic energy of an electron ejected from the metal surface that is exposed to monochromatic radiation depends on all except:
Ionization Energy and Electron Affinity
PYQ
a
Metal oxide
b
Frequency of the light used
c
Intensity of the light used
d
Wavelength of the light used
Also appeared in
37
In chromatography the mobile phase is called:
Phase Rule and Phase Diagrams
PYQ
a
Elution
b
Column
c
Eluate
d
Eluent
Also appeared in
38
Ethylene can be prepared using 1,2-dibromoethane as starting material. What else is used in preparation?
Green Chemistry Principles
PYQ
a
I₂ gas
b
Phthalate
c
KMnO₄
d
Alcoholic KOH
Also appeared in
39
Muhammad Bin Qasim tortured to death in a prison in Iraq during the caliphate of:
Green Chemistry Principles
PYQ
a
Yazid
b
Waleed
c
Sulaiman
d
None of these
Also appeared in
40
A wavelength of 345 nm occurs in which portion of the electromagnetic spectrum?
Schrödinger Wave Equation
PYQ
a
X-ray
b
Ultraviolet
c
Visible
d
Infrared
Also appeared in
41
In the complete cell diagram the two half cells are separated by double vertical line which represents:
Rate Laws and Order of Reaction
PYQ
a
Inert electrode
b
Salt bridge
c
Cathode half cell
d
Anode half cell
Also appeared in
42
How much energy is required to boil a kettle of water containing 1 litre at 15°C (Specific heat capacity of water= 4.18):
Enthalpy and Heat Capacity
PYQ
a
355 kJ
b
3550 kJ
c
3.5 kJ
d
35.50 kJ
Also appeared in
43
Buffering capacity can be calculate by the following mathematical equation?
Buffer Capacity and Indicators
PYQ
a
β = dC_{base}/dpH
b
β = Δn_{B} / ΔpH
c
β = Δn_{H⁺} / ΔpH
d
β = Δn_{OH⁻} / ΔpH
Also appeared in
44
The general pre-requisite condition for the stable existence of an interface between phases is that:
Entropy and Gibbs Free Energy
PYQ
a
Free energy of formation be negative
b
Free energy of formation be positive
c
Free energy of formation be zero
d
It can be +ve or negative but not zero
Also appeared in
45
Formic acid and acetic acid are distinguished from each other by reaction with:
Rate Laws and Order of Reaction
PYQ
a
NH₂OH
b
HgCl₂
c
NaOH
d
FeCl₃
Also appeared in
46
Graphite is used in nuclear reactors:
Effective Nuclear Charge and Shielding Effect
PYQ
a
As a lubricant
b
As a fuel
c
For lining the inside of the reactor as an insulator
d
For reducing the velocity of neutrons
Also appeared in
47
If 200 ml of a gas at constant pressure is heated from 0°C to 100°C, the volume is corrected by multiplying by:
Enthalpy and Heat Capacity
PYQ
a
0/100
b
100/0
c
273/273
d
373/273
Also appeared in
48
The most stable carbocation is:
Green Chemistry Principles
PYQ
a
C₆H₅CH₂⁺
b
(CH₃)₃C⁺
c
-CH₂
d
CH₃⁺
Also appeared in
49
Who was dismissed by the Governor-General on 2ⁿᵈ April, 1948 in Sindh?
Indus Valley Civilization
PYQ
a
M.A. Lashari
b
M.A. Khuhro
c
M.A. Khoso
d
M.A. Soomro
Also appeared in
50
The tragic incident of Karbala took place on Muharram:
Green Chemistry Principles
PYQ
a
55 AH
b
61 AH
c
70 AH
d
72 AH
Also appeared in
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Topic Weightage
Green Chemistry Principles
20%
Rate Laws and Order of Reaction
6%
Ionization Energy and Electron Affinity
6%
Entropy and Gibbs Free Energy
4%
Valence Bond Theory
4%
Schrödinger Wave Equation
4%
Effective Nuclear Charge and Shielding Effect
4%
Atomic Spectra and Line Spectra
4%
Indus Valley Civilization
4%
Enthalpy and Heat Capacity
4%
Buffer Capacity and Indicators
2%
Schr_dinger Wave Equation
2%
Elevation of Boiling Point and Depression of Freezing Point
2%
VSEPR Theory and Molecular Geometry
2%
Concentration Units
2%
Quantum Numbers and Atomic Orbitals
2%
Nitrogen and Oxygen Families
2%
Atomic Absorption Spectroscopy (AAS)
2%
Errors, Precision, and Accuracy
2%
Spontaneity and Equilibrium
2%
Hydrogen Bonding and van der Waals Forces
2%
Maxwell Relations and Thermodynamic Identities
2%
Krebs Cycle (TCA Cycle)
2%
Polymer Chemistry and Plastics
2%
Electronic Configuration and Term Symbols
2%
Boron Family and Carbon Family
2%
World Leaders in News
2%
Haber Process and Ammonia Manufacture
2%
Second Law of Thermodynamics
2%
Phase Rule and Phase Diagrams
2%