Which of the following will act as best oxidizing agents
$CrO_3$
$MoO_3$
$WO_3$
All of these
Which of the following pair of transitional elements exhibit highest and lowest density
In the following transition elements, the lowest $M.P.$ and $B.P.$ is exhibited by
White silver surface turns black when $O_3$ is passed over it. This is due to the formation of
Which pair of compound is expected to show similar colour in aqueous medium
Which of the following pairs of elements cannot form an alloy