Na
Ag
Hg
Fe
The metal which reacts most violently with with cold water is
The metallurgical process in which a metal is obtained in a fused state is called
The metals commonly used for electroplating are
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
The method that cannot be used for removing permanent hardness of water is
The mineral containing both magnesium and calcium is
The molecular formula of phosphorous is
The molecule which has the highest percentage of ionic character among the following is
The molecules of which gas have highest speed?
The monomer of polythene is
