Among the halogens,the one which is oxidised by nitric acid is

Which one among the following non-metals is liquid at $25 ^\circ C$?

When potassium dichromate crystals are heated with concentrated $HCl$,which gas is evolved?

The bond dissociation energies of $F_2, Cl_2, Br_2$ and $I_2$ are $155, 244, 193$ and $151 \ kJ \ mol^{-1}$ respectively. Which of these has the weakest bond?

The weakest acid $HX$ $(X = F, Cl, Br, I)$ is

Which of the following is a pseudohalogen analogue of an interhalogen?