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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
Biochemistry Introduction
Vitamin D is necessary for
eyes and skin
energy production in cells
healing wounds and preventing colds
bones and teeth
Author:
rikazzz
Comment
Characteristics of Acids Bases and Salts
The first successful theory of acids and bases was proposed by
J.N Bronsted
Svante Arrhenius
T.M lowery
G.N Lewis
Author:
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Comment
Characteristics of Acids Bases and Salts
What is the pH of the ammonia solution?
8
9
10
11
Author:
rikazzz
Comment
Environmental Chemistry: Atmosphere
What is meant by the term 'meso'?
top
middle
turning
changing
Author:
rikazzz
Comment
Environmental Chemistry: Atmosphere
The temperature of the outer mesosphere is
93 °C
−93 °C
;5 °C
−5 °C
Author:
rikazzz
Comment
Environmental Chemistry: Atmosphere
Most of the dust particles and water vapors are present in
troposphere
stratosphere
mesosphere
thermosphere
Author:
rikazzz
Comment
Biochemistry Introduction
RNA (Ribonucleic Acid) is made up of
ribose sugar
phosphate unit
nitrogen base
all of above
Author:
rikazzz
Comment
Characteristics of Acids Bases and Salts
Which of the following is used to clean metals and bricks?
hydrochloric acid
nitric acid
sulphuric acid
phosphoric acid
Author:
rikazzz
Comment
Chemical Industries
Number of carbon atoms per molecule in fuel oil is
14 to 20
20 to 50
50 to 70
70 to 90
Author:
rikazzz
Comment
Hydrocarbons
Which of the following is used as a simple test for the presence of unsaturation?
red colour of bromine solution
Decolourization of bromine solution
orange colour of bromine solution
none of above
Author:
rikazzz
Comment
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