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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Which of the following analytical method is used for the separation of dissolved components from solutions.
Choose an answer
Chromatography
Dialysis
Solvent extraction
Distillation
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Question # 2
The green colour of glass is due to the presence of.
Choose an answer
Chromium (III)
Cobalt (II)
Mn (IV)
Iron(III)
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Question # 3
A diameter of human hair is approximately ________________ m
Choose an answer
75000
75
7.5 x 10
-5
7.5 x 10
-9
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Question # 4
The unit cell having dimensions, a = b=c, alpha = beta= gama not equal 90
o
is known.
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Cubic
Trigonal
Tetragonal
Monoclinic
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Question # 5
Iodination of benzene takes place in the presence of iodine and
Choose an answer
HNO3
HIO3
HgO
All of these
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Question # 6
Which of the following is not correct criteria for an idea solution.
Choose an answer
Enthalpyh of mixing = 0
Volume of mixing = 0
Free energy of mixing = 0
Obeys Reoult's law
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Question # 7
Noble gases are sparingly soluble in water owing to.
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Dipole -dipole interactions
Dipole -induced dipole interactions
Hydrogen bonding
Induced dipole -instantaneous dipole interactions
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Question # 8
Borax exist in the form
Choose an answer
Ordinary borax
Octahdral borax
Borax glass
All above
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Question # 9
Carbides because of their hardness are
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Ionic carbides
Interstitial carbides
covalent carbides
Any of above
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Question # 10
Pick out the incorrect statement regarding ozone.
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O3 is an unstbale dark blue diamagnetic gas
The central oxygen in O3 is sp3 hybridized
It cause the tailing of mercury
It does not react with KOH
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