Elements and SubstancesEveryday Science
Which of the following non metal is lustrous?
Chlorine
Diamond
Iodine
Both B and C
Both B and C
Diamond and iodine are non-metals which are lustrous. Generally Non-metals do not have luster. They do not reflect light from their surface and they have dull appearance.
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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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