prep1 matter and its characteristics

the density of petroleum oil is ...............that of water.

• less than

• more than

• equal to

• no correct answer

all of the following substances conduct electricity except.............

• iron

• aluminium

• copper

• cork

equal masses of different substances have ...................... Volumes.

• Similar

• different

• constant

• equal

.................... doesn't melt by heating

• Rubber

• silver

• aluminium

• coal

separation of petroleum components depends on the difference in their ..............

• melting points

• densities

• boiling points

• all of them

an alloy used in making jewels(..................)

metals react with atomospheric oxygen after a long time.