Environmental Chemistry: WaterEveryday Science
What percentage of fresh water is available to man?
0.2
0.02
0.002
0.0002
0.002
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Vitamin C is soluble inA. fat
B. water
C. ethers
D. phenols
Which of the following is the most abundant salt in seawater?
A. magnesium chloride
B. calcium chloride
C. sodium chloride
D. sodium nitrate
The density of air in the atmosphere is
A. uniform
B. not uniform
C. zero
D. none of above
In the body, the weight of blood is about
A. 1/12th of body
B. 1/5th of body
C. 1/8th of body
D. 1/4th of body
Which substance is present in fuel?
A. Iron
B. Gold
C. Carbon
D. Copper
The energy stored in coal is
A. kinetic energy
B. potential energy
C. chemical energy
D. nuclear energy
A human breath per minute is
A. 16-30 times
B. 16-20 times
C. 15-20 times
D. 15-18 times
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