Solved Past Paper
SPSC Lecturer Chemistry Past Paper 7 February 2011
Practice and review SPSC Lecturer Chemistry Past Paper 7 February 2011 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
Nuclear fusion, like nuclear fission:
Chain Reactions and Photochemical Reactions
PYQ
a
is a chain process
b
is exoergic
c
produces several radioactive products
d
involves isotopes of heavy nuclei
Also appeared in
2
Which of the following spectroscopy uses an energy source of around 70ev?
World Leaders in News
PYQ
a
colorimetry
b
infrared
c
mass spectroscopy
d
emission spectroscopy
Also appeared in
3
If coordination number is 6, the radius ratio is:
Werner’s Coordination Theory
PYQ
a
0.155
b
0.414
c
0.225
d
0.7071
Also appeared in
4
The geometry and type of hybrid orbital present about the central atom in BF₃ is:
Atomic Spectra and Line Spectra
PYQ
a
Linear, sp
b
Trigonal planner, sp²
c
Tetrahedral, sp³
d
Pyramidal, sp³
Also appeared in
5
¹⁰P is unstable because:
Reactive Intermediates
PYQ
a
its n/p ratio is just 1
b
it is odd-odd nucleus
c
its Z is odd
d
it is chemical reactive
Also appeared in
6
The structure that remains after an acid has given up proton is called:
Lewis Acid-Base Theory
PYQ
a
conjugate acid
b
conjugate base
c
conjugate salt
d
conjugate proton
Also appeared in
7
In BH₃ molecule the H-B-H bond angle is 120°. What kind of hybridization is likely?
Valence Bond Theory
PYQ
a
sp
b
sp²
c
sp³
d
sp³d
Also appeared in
8
The critical temperature of water is higher than O₂; because the H₂O molecules have:
Ionization Energy and Electron Affinity
PYQ
a
fewer electrons than O₂
b
Two covalent bonds
c
V-shape
d
Dipole moment
Also appeared in
9
When a nucleus emits beta particles, the parent and daughter nuclei are:
Effective Nuclear Charge and Shielding Effect
PYQ
a
Isobars
b
Isotopes
c
Nuclear isomers
d
Isotones
Also appeared in
10
The uranium-238 decays to thorium-234 by process of:
Green Chemistry Principles
PYQ
a
Alpha radiation
b
Beta radiation
c
Gamma radiation
d
Fusion
Also appeared in
11
If pure P orbitals were used in forming the B-F bonds in BF₃, angles 90° would be expected. The actual observed bond angle is 120°. What concept might be useful in explaining the observed angles?
Collision Theory and Transition State Theory
PYQ
a
VSEPR theory
b
Ligand field theory
c
M.O theory
d
Hybridization
Also appeared in
12
The complexes that contain less than three d- electrons are ?
Ionization Energy and Electron Affinity
PYQ
a
stable
b
inert
c
unstable
d
labile
Also appeared in
13
A gas is said to behave like an ideal gas when the relation PV/T = Constant. When do you expect a real gas to behave like ideal gas.
Osmotic Pressure and Reverse Osmosis
PYQ
a
when the temperature is low
b
when both the temperature and pressure are low
c
when both temperature and pressure are high
d
when the temperature is high and pressure is low
Also appeared in
14
Which of the following units represents the largest amount of energy:
Ionization Energy and Electron Affinity
PYQ
a
Calorie
b
Joule
c
Erg
d
Electron volt
Also appeared in
15
If in the reaction of fluorine-19 with a neutron, nitrogen-16 is formed, what is the other particle given off in the reactions.
Chain Reactions and Photochemical Reactions
PYQ
a
Proton (₁¹H)
b
Alpha particle (₂⁴He)
c
Beta particle (₋₁⁰e)
d
Positron (₊₁⁰e)
Also appeared in
16
When two cubes are pressed over each other they unite to form one cube. Which of the following force is responsible for holding them together:
Hydrogen Bonding and van der Waals Forces
PYQ
a
Vander wall's forces
b
Covalent attraction
c
Hydrogen bond formation
d
Dipole-dipole interaction
Also appeared in
17
If P pure orbitals are used in forming the C-H bonds in CH₄ angles of 90° would be expected. The observed angles are 109° each. What concept might be useful in explaining the observed angles?
Crystal Field Theory
PYQ
a
M.O. Theory
b
Ligand field Theory
c
Hybridization
d
Crystal Field Theory
Also appeared in
18
The high polymer of Ethylene is known as:
Polymer Chemistry and Plastics
PYQ
a
Polystyrene
b
Tyrene
c
Tetrahene
d
Polythene
Also appeared in
19
The formula of potassium cobaltinitrite is:
Green Chemistry Principles
PYQ
a
K₂[Co(NO)₆]
b
K₃[Co(NO₂)₆]
c
K[Co(NO₃) ₆]
d
K₃[Co(NO)₆]
Also appeared in
20
An example of a nonstoichiometric compound is:
World Leaders in News
PYQ
a
Al₂O₃
b
Fe₃O₄
c
Ni O₂
d
PbO
Also appeared in
21
The radioactivity due to C-14 isotope (half life 6000 yrs) a sample of wood from an ancient tomb was found to be nearly half of that fresh wood. The tomb is therefore about:
Chirality and Optical Activity
PYQ
a
3000 yrs
b
6000 yrs
c
9000 yrs
d
12000 yrs
Also appeared in
22
Principal quantum number determines how far from the nucleus the ______ is to be found:
Quantum Numbers and Atomic Orbitals
PYQ
a
proton
b
neutron
c
electron
d
None of these
Also appeared in
23
Elements of d-block all have configurations.
S-block Elements
PYQ
a
ns¹/ns²
b
ns³/ns⁴
c
ns⁵ ns⁶
d
None of these
Also appeared in
24
Brønsted acid is a proton?
Lewis Acid-Base Theory
PYQ
a
accepter
b
donor
c
both A and B
d
None of these
Also appeared in
25
The distance between the two successive crests or two successive troughs is called:
Schrödinger Wave Equation
PYQ
a
wave-length
b
frequency
c
wave number
d
None of these
Also appeared in
26
Carbon dioxide molecule has:
Atomic Spectra and Line Spectra
PYQ
a
bent structure
b
triangular structure
c
linear structure
d
None of these
Also appeared in
27
Array of points which show how the constituent particles of a crystal are arranged at different sites in 3 dimensional space is called:
Elevation of Boiling Point and Depression of Freezing Point
PYQ
a
space lattice
b
lattice array
c
crystal lattice
d
None of these
Also appeared in
28
Ionic hydrides are formed by elements of:
Atomic and Ionic Radii
PYQ
a
group-III A
b
group-II A
c
group-IA
d
None of these
Also appeared in
29
Paramagnetic compounds are ______ by the magnetic field:
Nomenclature of Coordination Compounds
PYQ
a
repelled
b
attracted
c
Both A and B
d
None of these
Also appeared in
30
The compounds having all the electrons paired are called ?
Ionization Energy and Electron Affinity
PYQ
a
Ferromagnetic
b
Diamagnetic
c
Paramagnetic
d
None of these
Also appeared in
31
At equilibrium at specific temperature, pressure exerted by the liquid is called?
Spontaneity and Equilibrium
PYQ
a
Gaseous pressure
b
Vapour pressure
c
Solid pressure
d
None of these
Also appeared in
32
A substituent effect on an organic compound due to the permanent polarity of the group is called?
Effective Nuclear Charge and Shielding Effect
PYQ
a
inert pair effect
b
inductive effect
c
chelate effect
d
None of these
Also appeared in
33
An orbital which possesses lower energy than the atomic orbitals from which it is formed is called?
Quantum Numbers and Atomic Orbitals
PYQ
a
Anti bonding
b
Bonding
c
Addition
d
None of these
Also appeared in
34
PH is the logarithm of the reciprocal of the?
Hydrogen Bonding and van der Waals Forces
PYQ
a
hydrogen ion concentration
b
phosphorous ion concentration
c
phosphine ion concentration
d
None of these
Also appeared in
35
A lewis structure is a representation of a molecule that shows the disposition of?
Ionization Energy and Electron Affinity
PYQ
a
valence protons
b
valence electrons
c
valence neutrons
d
None of these
Also appeared in
36
The hydrogen bond has?
Valence Bond Theory
PYQ
a
electrostatic nature
b
neutral nature
c
coordinate nature
d
None of these
Also appeared in
37
The function of the nerve cell is:
Chirality and Optical Activity
PYQ
a
to transmit messages
b
to feel things
c
to give activity of flesh
d
to give out body poison
Also appeared in
38
Man differs from birds in that man has:
Green Chemistry Principles
PYQ
a
a four-chambered heart
b
hair
c
warm blood
d
a cerebrum
Also appeared in
39
A radio signal will travel around the earth (in a great circle) in about:
Second Law of Thermodynamics
PYQ
a
1 Second
b
1/7 Second
c
2 days
d
instantly
Also appeared in
40
We can see most objects because they:
Green Chemistry Principles
PYQ
a
reflect light
b
emit light
c
absorb light
d
refract light
Also appeared in
41
Acupuncture is a technique practised by:
Green Chemistry Principles
PYQ
a
Indian yogis
b
Indonesian witch doctors
c
Chinese medicine men
d
Russian surgeons
Also appeared in
42
What are hormones?
Hormones and Physiological Buffers
PYQ
a
secretions of liver
b
the happy looking and living among the men
c
secretions of duetless glands
d
the bone marrow
Also appeared in
43
Ajnadayn is located in:
Green Chemistry Principles
PYQ
a
Egypt
b
Iran
c
Iraq
d
Palestine
Also appeared in
44
Hazrat Bilal (RA) was liberated by Hazrat Abu Bakr (RA). Amir bin Faheera was set free by:
Entropy and Gibbs Free Energy
PYQ
a
Hazrat Abu Bakr (RA)
b
Hazrat Umar (RA)
c
Hazrat Usman (RA)
d
Hazrat Ali (RA)
Also appeared in
45
The Battle of Yermuk was fought during the caliphate of:
Green Chemistry Principles
PYQ
a
Hazrat Abu Bakr (RA)
b
Hazrat Umar (RA)
c
Hazrat Usman (RA)
d
Hazrat Ali (RA)
Also appeared in
46
The Battle of Safeen was fought in 37 A.H. between Hazrat Ali (RA) and:
Green Chemistry Principles
PYQ
a
Khargis
b
Hazrat Abdullah bin Zubair (RA)
c
Hazrat Muawia (RA)
d
Hazrat Aisha (RA)
Also appeared in
47
The only Indian on the Viceroy Lord Mountbatten's staff was:
Green Chemistry Principles
PYQ
a
Abul Kalam Azad
b
V.P. Menon
c
Ghafuar Khan
d
None of these
Also appeared in
48
The Govt: of India Act of 1935 came into operation in provisional part:
Green Chemistry Principles
PYQ
a
1935
b
1936
c
1937
d
1938
Also appeared in
49
Give the name of the author of "the Last days of United Pakistan":
Green Chemistry Principles
PYQ
a
G.W. Chaudhary
b
Herbert Feldman
c
Anwar H. Syed
d
I.H. Qureshi
Also appeared in
50
The first amendment to the Constitution of 1973 which allowed every citizen to form a political party was passed in the year of:
First Law of Thermodynamics
PYQ
a
1973
b
1974
c
1975
d
1976
Also appeared in
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Topic Weightage
Green Chemistry Principles
22%
Ionization Energy and Electron Affinity
10%
Chain Reactions and Photochemical Reactions
4%
World Leaders in News
4%
Atomic Spectra and Line Spectra
4%
Lewis Acid-Base Theory
4%
Valence Bond Theory
4%
Effective Nuclear Charge and Shielding Effect
4%
Hydrogen Bonding and van der Waals Forces
4%
Chirality and Optical Activity
4%
Quantum Numbers and Atomic Orbitals
4%
Werner’s Coordination Theory
2%
Reactive Intermediates
2%
Collision Theory and Transition State Theory
2%
Osmotic Pressure and Reverse Osmosis
2%
Crystal Field Theory
2%
Polymer Chemistry and Plastics
2%
S-block Elements
2%
Schrödinger Wave Equation
2%
Elevation of Boiling Point and Depression of Freezing Point
2%
Atomic and Ionic Radii
2%
Nomenclature of Coordination Compounds
2%
Spontaneity and Equilibrium
2%
Second Law of Thermodynamics
2%
Hormones and Physiological Buffers
2%
Entropy and Gibbs Free Energy
2%
First Law of Thermodynamics
2%