Bell metal is an alloy of
$Cu,\,Zn$ and $Sn$
$Cu,\,Zn$ and $Ni$
$Cu$ and $Zn$
$Cu$ and $Sn$
Which element is alloyed with copper to form bronze
Which one of the following ions is colourless
To obtain steel entirely free from sulphur and phosphorus, the process used is
By annealing, steel
Discuss the catalytic properties of transition elements.