What is the correct order of the following elements with respect to their density ?
$Cr < Zn < Co < Cu < Fe$
$Zn < Cu < Co < Fe < Cr$
$Zn < Cr < Fe < Co < Cu$
$Cr < Fe < Co < Cu < Zn$
Which of the following sulphides is yellow in colour
The aqueous solution containing which one of the following ions will be colourless
Which of the following ions form most stable complex compound[
Mark the steel in which carbon $\%$ is highest
Mercury is transported in metal containers made of