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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: Water
Process in which water is filtered through sand and gravel is called
sedimentation
coagulation
filtration
chlorination
Author:
rikazzz
Comment
Chemical Industries
Which of the following is used as a chemical feedstock for making drugs, plastics, and other chemicals?
Liquid Petroleum Gas (LPG)
petrol
naphtha
kerosene
Author:
rikazzz
Comment
Biochemistry Introduction
Vitamin A is necessary for
eyes and skin
energy production in cells
healing wounds and preventing colds
bones and teeth
Author:
rikazzz
Comment
Organic Chemistry
Organic compounds are
non-volatile
volatile
have high melting point
have high boiling point
Author:
rikazzz
Comment
Biochemistry Introduction
Nucleic acids were first obtained from
blood of infected wounds
pus of infected wounds
skin
muscles
Author:
rikazzz
Comment
Environmental Chemistry: Atmosphere
The outer layer of the thermosphere is
ionosphere
exosphere
mesosphere
stratosphere
Author:
rikazzz
Comment
Characteristics of Acids Bases and Salts
The water molecule which accepts a proton becomes a negatively charged
hydroxide ion
oxygen ion
hydrogen ion
hydronium ion
Author:
rikazzz
Comment
Biochemistry Introduction
The vitamin which helps in ant oxidation is
vitamin E
vitamin K
vitamin A
vitamin D
Author:
rikazzz
Comment
Hydrocarbons
What is the physical state of the first four alkanes?
solid
liquid
gas
plasma
Author:
rikazzz
Comment
Biochemistry Introduction
Proteins work in the body to
transport and store oxygen and nutrients
speed up reactions
regulate important systems
all of above
Author:
rikazzz
Comment
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