The oxoanion in which the oxidation state of the central atom is same as its group number in the periodic table is
$SO_4^{2-}$
$VO_2^-$
$MnO_4^{2-}$
$Cr_2O_7^{2-}$
Which of the following ions will exhibit colour in aqueous solutions?
Which one of the following statements shows the correct percentage of carbon in steel, pig iron and wrought iron
Which of the following is wrongly matched
Steel differs from pig iron and wrought iron in that it contains
In the series $Sc(Z = 21)$ to $Zn(Z = 30)$ , the enthalpy of atomization of _____ is the lowest