Elements and SubstancesEveryday Science
Which one of the following is the good conducter of electricity?
Iron rod
Wood
Coal piece
Sulphur
Iron rod
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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
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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