When chlorine gas is passed over dry slaked lime,the product formed is ...........

Concentrated $H_2SO_4$ is not used to prepare $HBr$ from $KBr$ because it

Select the correct set of species which cannot react with water but react with $NaOH$:
$(i) \, NO_2$ $(ii) \, P_4$ $(iii) \, Al$ $(iv) \, I_2$

Which among the following molecules has the lowest bond dissociation enthalpy?

The least number of oxyacids are formed by

$Fluorine$ does not form positive oxidation states because