Which among the following pairs of halogens forms the interhalogen compound of the type $XX_{7}^{\prime}$?

Which of the following reactions proves the chlorinating property of phosphorus pentachloride?

Which of the following acids is the weakest?

Which of the following interhalogen compounds does not exist?

Concentrated $H_2SO_4$ cannot be used to prepare $HBr$ from $NaBr$,because it

An inorganic white crystalline compound $(A)$ has a rock salt structure. $(A)$ on reaction with conc. $H_2SO_4$ and $MnO_2$ evolves a pungent smelling,greenish-yellow gas $(B)$. Compound $(A)$ gives a white precipitate of $(C)$ with $AgNO_3$ solution. Compounds $(A)$,$(B)$,and $(C)$ will be respectively: