The property of metals by which they can be beaten into thin sheets is called ................
ductility
malleability
viscosity
tensile strength
B.
malleability
The process of depositing a layer of any desired metal on another metal by means of electricity is called ...........
Electroplating
Galvanisation
Rusting
Crystallisation
Energy in the form of heat is wasted when a machine is operated. This heat is generated due to ___________.
burning
friction
combustion
lubrication
The salt concentration (measured as salinity in parts per thousand), is..........% in sea.
10-20
30-35
40-50
60-70
The salt concentration (measured as salinity in parts per thousand), is greater than .............% in hypersaline lagoons.
50
100
150
200
Acetic Acid is another name for which of the following?
Vinegar
Baking Soda
Copper Sulphate
Magnesium Oxide
The temperature at which a solid melts to become a liquid at atmospheric pressure is called..........
crystallisation
melting point
evaporation
galvanisation
A change in which one or more new substances are formed is called .................
Physical Change
Chemical Change
Rusting
Galvanisation