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Chemistry
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Acids Bases and Salts
23
Biochemistry Introduction
217
Characteristics of Acids Bases and Salts
114
Chemical Industries
66
Environmental Chemistry: Atmosphere
95
Environmental Chemistry: Water
61
Chemical Equilibrium
46
Hydrocarbons
86
Organic Chemistry
92
The Atmosphere
25
Show/Hide Answers
Environmental Chemistry: Atmosphere
Most of the mass of the atmosphere is contained in
troposphere
stratosphere
mesosphere
thermosphere
Author:
rikazzz
Comment
Characteristics of Acids Bases and Salts
What is the pH of a broad bean?
5.5 – 7.0
6.5 – 7.0
6.0 – 7.5
6.5 – 7.5
Author:
rikazzz
Comment
Hydrocarbons
What causes the red color of tomatoes?
lycopene
ethene
ethylene glycol
acetylene
Author:
rikazzz
Comment
Characteristics of Acids Bases and Salts
Taste of base is
sour
sweet
bitter
it is tasteless
Author:
rikazzz
Comment
Environmental Chemistry: Atmosphere
Which of the following is a powerful irritant which can aggravate the symptoms of people who suffer from respiratory disorders?
sulphur dioxide
carbon monoxide
carbon dioxide
oxides of nitrogen
Author:
rikazzz
Comment
Characteristics of Acids Bases and Salts
What is the color of methyl orange in vinegar?
red
yellow
blue
pink
Author:
rikazzz
Comment
Environmental Chemistry: Water
The hardness that cannot be removed by boiling is called
temporary hardness
permanent hardness
semi temporary hardness
semi permanent hardness
Author:
rikazzz
Comment
Biochemistry Introduction
Structure of DNA was discovered by
J.Watson only
Francis Crick only
F.G Hopkins
J.Watson and Francis Crick
Author:
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Comment
Biochemistry Introduction
Two fatty acids that are components of fats are
stearic acid and oleic acid
butyric acid and caproic acid
palmitic acid and oleic acid
none of above
Author:
rikazzz
Comment
Chemical Equilibrium
Unit of the equilibrium constant for N2O4 2NO2 is
mol dm-4
mol dm-3
dm3mol-1
mol dm-3
Author:
rikazzz
Comment
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