An oxide of copper which is red in colour has the formula
$CuO$
$Cu_2O$
$CuO_2$
$Cu_2O_2$
Which of the following statements is incorrect?
Cuprous ion is colourless while cupric ion is coloured because
The catalytic activity of the transition metal and their compound is due to their
The addition of metals like $Cr,\,Mn,\,W$ and $Ni$ to ordinary steel makes it
Which of the following alloys contain only $Cu $ and $Zn$