AIPMT 2011 Preliminary Mock Test

Which of the two ions from the list given below have the geometry that is explained by the same hybridization of orbitals: ${\text{NO}}_2^{-}$, ${\text{NO}}_3^{-}$, ${\text{NH}}_2^{-}$, ${\text{NH}}_4^{+}$, ${\text{SCN}}^{-}$?

Which of the following elements is present as the impurity to the maximum extent in the pig iron?

Which of the following is least likely to behave as a Lewis base?

Which one of the following is present as an active ingredient in bleaching powder for bleaching action?

The complex $[\text{Pt}(\text{Py})({\text{NH}}_3)\text{BrCl}]$ will have how many geometrical isomers?