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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
Chemical Equilibrium
The relationship by which the values that relate amounts of products to reactants at equilibrium can be determined is called
law of conservation of mass
law of chemical reactions
law of mass action
active mass
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Environmental Chemistry: Atmosphere
Height of troposphere is
10 Km
12 Km
50 Km
80 Km
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Characteristics of Acids Bases and Salts
Complete neutralization of Carbonic acid forms
carbon dioxide
hydrogen carbonate
carbonate
carbon monoxide
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Environmental Chemistry: Water
Process in which water is allowed to stand in a reservoir is called
sedimentation
coagulation
filtration
chlorination
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Environmental Chemistry: Atmosphere
The thermosphere is divided into how many layers?
two
three
four
five
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Chemical Industries
Ore of chromium is called
galena
zinc blende
cinnabar
chromite
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Environmental Chemistry: Water
Hard water can block radiators due to the formation of
insoluble calcium and magnesium salts
insoluble sodium salts
insoluble phosphate salts
insoluble potassium salts
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Comment
Hydrocarbons
How does fluorine react?
explosively
slowly in dark but rapidly in strong sunlight
requires high temperature or strong sun light
essentially unreactive
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Biochemistry Introduction
Anemia, bleeding gums and tongue inflammation is caused by the deficiency of
vitamin A
vitamin B12
vitamin C
vitamin D
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Characteristics of Acids Bases and Salts
What is the optimum pH range of a swimming pool?
6.2-6.6
7.2-7.6
7
8.2-8.6
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rikazzz
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