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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
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Chemical Industries
The process of smelting involves the
reduction of metal oxides
oxidation of minerals
oxidation of metals
melting of metals
Author:
rikazzz
Comment
Chemical Industries
The boiling point of kerosene is
below 20 °C
35 °C to 70 °C
70 °C to 120 °C
170 °C to 250 °C
Author:
rikazzz
Comment
Hydrocarbons
After the first three members, the next eight members of alkynes are
solids
liquids
gases
plasma
Author:
rikazzz
Comment
Biochemistry Introduction
Vitamin D is soluble in
fat
water
ethers
phenols
Author:
rikazzz
Comment
Characteristics of Acids Bases and Salts
Which of the following increases when pH is less than 7?
[H+]
[OH-]
[OH+]
[O-]
Author:
rikazzz
Comment
Chemical Industries
Ore of sodium is called
hematite
chalcopyrite
bauxite
halite
Author:
rikazzz
Comment
Environmental Chemistry: Atmosphere
Height of mesosphere is
0-12 Km
12-50 Km
50-80 Km
above 80 Km
Author:
rikazzz
Comment
Biochemistry Introduction
How many amino acids are synthesized by our bodies?
10
20
30
40
Author:
rikazzz
Comment
Organic Chemistry
Which of the following is used in the preparation of polymers like PVC?
ethylene
acetylene
phenol
methanol
Author:
rikazzz
Comment
The Atmosphere
The temperature variation in the stratosphere is about
−5 °C to 50 °C
−5 °C to 50 °C
10 °C to 20 °C
−55 °C to −5 °C
Author:
rikazzz
Comment
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