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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 Industries
Process in which mineral is separated from the gangue by some physical method is called
crushing, grinding or pulverizing of the ore
concentration of the ore
extraction of metal
refining of metal
Author:
rikazzz
Comment
Chemical Industries
Crude oil is converted into useful products by
drilling
Solvay process
roasting
refining
Author:
rikazzz
Comment
Environmental Chemistry: Atmosphere
Which of the following is the fourth layer of atmosphere as one moves upwards from the Earth's surface?
troposphere
stratosphere
mesosphere
thermosphere
Author:
rikazzz
Comment
Biochemistry Introduction
Sugars which rotate the plane of polarized light in a clockwise direction are called
lactose sugars
complex sugars
dextrose sugars
simple sugars
Author:
rikazzz
Comment
Environmental Chemistry: Atmosphere
The lower layer of the thermosphere is
ionosphere
exosphere
mesosphere
stratosphere
Author:
rikazzz
Comment
Chemical Equilibrium
The equilibrium constant can be used to
predict direction of chemical reaction
predict extent of chemical reaction
determine the equilibrium concentration of mixture
all of above
Author:
rikazzz
Comment
Chemical Industries
Ore of mercury is called
galena
zinc blende
cinnabar
chromite
Author:
rikazzz
Comment
Environmental Chemistry: Water
At what temperature would a sample of heavy water freeze?
0.6 °C
6.52 °C
3.82 °C
None of these
Author:
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Comment
Characteristics of Acids Bases and Salts
What is the pH at which methyl red changes color?
5.5
7
9
10
Author:
rikazzz
Comment
Characteristics of Acids Bases and Salts
What is the pH of the drain cleaner?
1
2
12
14
Author:
rikazzz
Comment
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