Among the following,the number of halide$(s)$ which is/are inert to hydrolysis is ..........
$(A)$ $BF_3$
$(B)$ $SiCl_4$
$(C)$ $PCl_5$
$(D)$ $SF_6$

Consider the following reactions :
$(i)$ $F_2 + 2X^{-} \to 2F^{-} + X_2$ $(X = Cl, Br, I)$
$(ii)$ $Cl_2 + 2X^{-} \to 2Cl^{-} + X_2$ $(X = Br, I)$
$(iii)$ $I_2 + 2Br^{-} \to 2I^{-} + Br_2$
Which option has only the correct set of reactions?

Only iodine forms hepta-fluoride $IF_7$,but chlorine and bromine give penta-fluorides. The reason for this is:

Chlorine acts as a bleaching agent only in the presence of

Which one of the following is a pseudohalide?

What is the product formed when concentrated $HNO_3$ reacts with iodine?