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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
Characteristics of Acids Bases and Salts
Which of the following is used as an antacid and laxative?
sodium hydroxide
potassium hydroxide
calcium hydroxide
magnesium hydroxide
Author:
rikazzz
Comment
Biochemistry Introduction
Enzymes are protein in nature and are used as
biological catalyst
chemical catalyst
reaction inhibitor
reaction stopper
Author:
rikazzz
Comment
Chemical Industries
Third step of metallurgy is
crushing, grinding or pulverizing of the ore
concentration of the ore
extraction of metal
refining of metal
Author:
rikazzz
Comment
Chemical Equilibrium
Unit of the equilibrium constant for 2NO + O2 2NO2 is
no units
mol dm-3
dm3mol-1
dm3mol-2
Author:
rikazzz
Comment
Hydrocarbons
Which color of KMnO
4
solution is discharged when an alkene is treated with a dilute alkaline aqueous solution of KMnO4?
red
brown
orange
pink
Author:
rikazzz
Comment
Chemical Equilibrium
A reversible reaction
always completes
never goes to completion
spontaneous reactions
non spontaneous reactions
Author:
rikazzz
Comment
Biochemistry Introduction
The general formula of carbohydrates is
CnH2n+2
CnH2n
CnH2n-2
Cx(H2O)y
Author:
rikazzz
Comment
Hydrocarbons
The simplest alkane is
butane
propane
methane
ethane
Author:
rikazzz
Comment
Environmental Chemistry: Atmosphere
If silk clothes are left in the open air for a week or so, their color fades because of
sulphur dioxide is converted into sulphur trioxide
dirt
carbon monoxide
nitrogen oxides
Author:
rikazzz
Comment
Biochemistry Introduction
DNA is found in
cytoplasm
vacuole
cell nucleus
none of above
Author:
rikazzz
Comment
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