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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
Tertiary aleohols producewith acidified KMno,
Choose an answer
Ketones
Aldehydes
Malonic acid
Alkene
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Question # 2
Irreversible precipitation of protein caused by heating is called
Choose an answer
Polymerization
Denaturing
Inversion
Co-angular
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Question # 3
Ornithine is
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A basic amino acid
An essential amino acid
Present in protein structure
All of these
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Question # 4
The number of atoms in 0.004 g of magnesium is close to
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24
2 x 10
20
10
20
6.02 x 10
23
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Question # 5
Which of the following equations represents the 2nd ionization energy of Na?
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Na(g) ---> Na
2+
(g) + 2e
-
Na(s) ---> Na
2+
(g) + 2e
-
Na
+
(s) ---> Na
2+
(g) + e
-
Na
+
(g) ---> Na
2+
(g) + e
-
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Question # 6
NH
3
shows a maximum boiling point among the hydrides of V-A group elements due to :
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very small size of nitrogen
lone pair of electrons present on nitrogen
enhanced electronegative character of nitrogen
pyramidal structure of NH
3
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Question # 7
The region of earth capable of supporting life is
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Hydrosphere
Lithosphere
Biosphere
Atmosphere
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Question # 8
Sea gets polluted bu accidental oil spills and
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Atmospheric pressure
Nitrogen gas
Cargo oil tankers
Aero plane
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Question # 9
At present the number or cement factories in Pakistan are:
Choose an answer
20
22
25
30
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Question # 10
The net heat change in a chemical reaction is the same whether it is brought about in two or more different ways in one or several steps.it is known as
Choose an answer
Henry's law
Hess's law
joule's law
Law of conservation of energy
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Question # 11
If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will
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remain unchanged
increase four times
reduce to 1/4
be doubled
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Question # 12
First atomic theory was put forward by an English school teacher:
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Maxewell
Newton
Sanger
John Dalton
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Question # 13
The molal elevation constant is the ratio of the elevation in boiling point to
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Molarity
Molality
Mole fraction of solute
Mole fraction of solvent
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Question # 14
Transition elements are called so because:
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Form interstital sompounds
have high m.p
In between 's' and' 'p' block elements
All of these
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Question # 15
In 1000 molecules of 0.001 M acetic acid the number of H
+
ions is 12.6, then its percentage of ionization is
Choose an answer
1.33%
1.26%
12.6
1%
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Question # 16
The most commonly and widely used nitrogen fertilizer in Pakistan is
Choose an answer
Urea
Ammonium nitrate
Ammonium sulphate
Ammonium chloride
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Question # 17
Which of the following statement is incorrect about SHE(Standard hydrogen electrode):
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Reduction potential of Cu
+2
is smaller than H
+
ions whenit is coupled with copper electrode.
gas is passed in it at 1 atm pressure.
Its oxidation potential and reduction potential is zero.
It is made of platinum wire dipped in HCl solution
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Question # 18
Azimuthal quantum number of last electron of
11
Na is
Choose an answer
1
2
3
0
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Question # 19
Cellulose does:
Choose an answer
Satisfy human appetite
Stimulates intestinal peristalsis
Gives fibre and bulk to the food
All of these
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Question # 20
Water which his considered to be safe for human consumption is known as
Choose an answer
Distilled water
Contaminated water
Potable water
Rain water
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Question # 21
Which of the following has highest dipole moment?
Choose an answer
NH
3
PH
3
AsH
3
SbH
3
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Question # 22
With the progressive of the reaction the slope of the curve between concentration of product and time
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Gradually becomes more steep
Gradually becomes less steep
No change occurs in slope
None of these occurs
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