What are the properties of inter halogen compounds?

(i) \(\mathrm{PCl}_{5}+\mathrm{Ag} \longrightarrow \text { ? } \)
(ii) \(\mathrm{AgCl}_{(s)}+\mathrm{NH}_{3(\mathrm{aq})} \longrightarrow ? \)
(iii) \(\mathrm{PCl}_{3} \stackrel{\text { Moist air }}{\longrightarrow} \text { ? } \)
(iv) \(\mathrm{PCl}_{5} \stackrel{\text { Moist air }}{\longrightarrow} ? \)
(v) \(\mathrm{NaH}_{2} \mathrm{PO}_{2}+\mathrm{HCl} \longrightarrow ?\)

An element A occupies group number 15 and period number 3, exhibits allotropy and it is tetra atomic. A reacts with caustic soda to give B which is having rotten fish odour. A reacts with chlorine to give C which has a pungent odour Identify A, B and C. Write the reactions.

An element 'A' occupies group number 15 and period number 3. It reacts with chlorine to give B which further reacts with chlorine to give C at 273K. Both B and C are chlorinating agents for organic compounds. C is a better chlorinating agent because it chlorinates metals also. Breasts with SO₃ and reduces it to SO₂ B has a pyramidal shape. C has trigonal bipyramidal shape by sp³d hybridisation. Identify the element A and the compounds B and C. Write the reactions.

An element A occupies group number 15 and period number 3, reacts with chlorine to give compound B. The compound B on hydrolysis gives a dibasic acid C. The compound C on heating undergoes auto oxidation and reduction to give a tribasic acid D. Identify the elements A compounds B, C and D. Write the reactions.