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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
Hydrocarbons
Which of the following is used as antifreeze in automobile radiators?
ethane
methane
lycopene
ethylene glycol
Author:
rikazzz
Comment
Hydrocarbons
How much ethene is required for the ripening of 1 kg of tomatoes?
1 mg
100 mg
10 mg
0.1 mg
Author:
rikazzz
Comment
Environmental Chemistry: Atmosphere
The energy of sunlight is converted into heat by
oxygen only
nitrogen only
hydrogen
oxygen and nitrogen
Author:
rikazzz
Comment
Hydrocarbons
What is the term used for the reaction of an alkane and a halogen?
substitution reaction
elimination reaction
Dehydrohalogenation
hydrogenation
Author:
rikazzz
Comment
Environmental Chemistry: Atmosphere
Which of the following is closest to the Earth's surface?
troposphere
stratosphere
mesosphere
thermosphere
Author:
rikazzz
Comment
Environmental Chemistry: Water
Out of total the amount of water available for human use is
0.003
0.002
0.4
0.5
Author:
rikazzz
Comment
Environmental Chemistry: Water
What happens to water on cooling?
it expands up to 4 °C
it contracts up to 4 °C
it expands up to 2 °C
it contracts up to 2 °C
Author:
rikazzz
Comment
Chemical Equilibrium
Due to the high concentration of reactants, the rate of the forward reaction is
lowest
moderate
highest
minimal
Author:
rikazzz
Comment
The Atmosphere
At every 1 km increase in altitude, the air gets about
10 °C cooler
6.5 °C hotter
6.5 °C cooler
20 °C cooler
Author:
rikazzz
Comment
Hydrocarbons
Tetrahydroxy ethane loses two water molecules to form
oxalic acid
Glyoxal
acetylene
ethylene glycol
Author:
rikazzz
Comment
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