Copper and aluminum have effect on magnet of...
a) attract
b) repel
c) both attract and repel
d) no effect
Due to its high heat exchange rate, copper is used in……….
a) dispenser
b) refrigerator
c) AC
d) all of these
In the Composition of the earth, Aluminum is….?
a) 27.5%
b) 20.3%
c) 14.5%
d) 8.23%
Formula of water is……..
a) H2O
b) Ho
c) H3o
d) Ho
Water is composed of one atom of oxygen and.
a) one hydrogen
b) two hydrogen
c) three hydrogen
d) none of these
Which of the following is called the “universal solvent”?
a) air
b) water
c) milk
d) alcohol
