The catalyst used in the contact process is
$Fe_2O_3$
$V_2O_5$
$SO_3$
$Ag_2O$
Identify the alloy containing a non-metal as a constituent in it.
Which is heaviest among the following
Incorrect match is
ppt $\rightarrow$ colour
The colour imparted by $Co(II)$ compounds to glass is
Highest $(+7) $ oxidation state is shown by