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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
a-pinene hydrochloride on warming rearrangements to form bornyl chloride
Choose an answer
Pinacol pinacolone
hofmann
Wagner Meerwein
Wolf
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Question # 2
Which of the following is not a polysaccharide
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Cellobiose
Cellulose
Insulin
Amylase
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Question # 3
The variation of enthalpy of reaction with temperature is given by.
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Hesse's law
Clasisus Clapayron equation
Kirchoffs equation
Arrhenious equation.
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Question # 4
Which of the following statements is false about transition metals.
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They form complexes
They show variable valency
All transition metal compounds are paramagnetic
They form coloured ions
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Question # 5
Which of the following element has six electrons in the valance shell but cannot exhibit a maximum co valency of six.
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Sulpher
Oxygen
Salenium
Both A and B
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Question # 6
Which of the following properties of a system does not change in a state of equilibrium.
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Density
Pressure
Colour
All above properties
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Question # 7
pKa value of hyponitrous acid is.
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-7.0
8.9
4.1
6.6
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Question # 8
Among LiCl, BeCl2, BCl3, and CCl4 the covalent bond character follows the order.
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LiCl < Becl2< Bcl3 < CCl4
LiCl > BeCl2 < BCl3<CCl4
LiCl< Becl2 < BCl3 < CCl4
LiCl > Becl2 > BCl3 < CCl4
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Question # 9
The number of mole of the solute dissolved per dm3 of the solution is called.
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Molality
Formality
Normality
Molarity
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Question # 10
The pH of the tears is
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7.0
7.4
7.8
8.2
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Question # 11
Helium is used for
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The preservation of food
Filling electrical transformer
Pressuring agent in rockets
All of above
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Question # 12
In Dumas method, the volume of the gas collected is equivalent to which of the following gases set free from the compound.
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Ammonia
O2
N2
NO
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Question # 13
Which of the following is not correct criteria for an idea solution.
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Enthalpyh of mixing = 0
Volume of mixing = 0
Free energy of mixing = 0
Obeys Reoult's law
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Question # 14
Which of the following elements has the highest ionization energy.
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Na
Si
Ar
Cl
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Question # 15
In the Lewis structure of H2SO4 molecule the total number of unshared electrons in valence shell of various atoms is.
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8
16
12
20
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Question # 16
Which of the following enthalpies is always negative.
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Enthalpy of melting
Enthalpy of combustion
Enthalpy of solution
Enthalpy of formation
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Question # 17
The process of extracting a metal in pure form its ores is known as.
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Crushing
Grinding
Dressing
Metallurgy
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Question # 18
The freezing point of a solvent
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Will increase on adding a solute
Will decrease on adding a solute
Will note change on adding solute
None of the above
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Question # 19
Stereotsomers not related to each other as object and minor image are called.
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Enantiomers
Diastereolsomers
Conformations
Antipodes
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Question # 20
The number of degree freedom at the triple point for the water system in.
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One
Two
Three
Zero
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Question # 21
Identify the incorrect statement regarding crystallization from the following.
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It is an important procedure for purifying solids
The impurities are removed by filtering the solution
Crystals are separated by filtration
In crystallization method, the solid is dissolved in a solvvent in which it is soluble at all temperature.
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Question # 22
Which of the following is a mode of controlling pollution in big cities.
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Cleanliness and less use of insecticides
Proper disposal of organic wastes, sewage and industrial effluents
Broader roads and shifting of factories out of the residential areas
All of above
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Question # 23
Which of the following statement is not correct.
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The element with highest IE belongs to group 18
In each period the element with lowest IE belongs to group I
In each period the element with highest IE is a noble gas
In the second period as we move from left to right, ionization energy increases reqularly.
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Question # 24
The process of transfer of genetic message from DNA to m-RNA is known as
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Refplication
Translation
Transcription
Transference
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Question # 25
All steroids on heating wish solenium give
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phenanthrene
Cholesterol
Diels hydrocarbon
Isoprene
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Question # 26
Which of the following phenomenon are driven by solar energy.
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Winds
Water cycle
Production of biomass
All above
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Question # 27
iodine is used as
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Tincture of iodine
Iodex and antiseptic
Treatment of goiter
All above
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Question # 28
Who prepared and explained nano tubes for the first time.
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Sumio Tijima
Richard Smaley
Erick Drexler
Richard Feynamann
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Question # 29
AI Cl3 acts as a strong Lewis acid, because it is.
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A covalent compound
Readily hydrolyzed
Electron deficient
An ionic compound
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Question # 30
Which of the following is not an alum.
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KAI (SO4)3 12 H2O
NaAI (SO4)2 12 H2O
NH4Fe (SO4)2 12H2O
FeAl (SO4)2 . 12 H2O
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Question # 31
Which of the following has maximum number of unpaired electrons.
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Fe3+
Fe2+
Co2+
CO3+
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