Elements and SubstancesEveryday Science
Which substance is present in fuel?
Iron
Gold
Carbon
Copper
Carbon
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Vitamin C is soluble inA. fat
B. water
C. ethers
D. phenols
Which one of the following does not react with acids?
A. O
B. Cr
C. Cu
D. Ni
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
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
Symbol of Copper is
A. Ca
B. Cl
C. Co
D. Cu
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