(a) Account for the following :

(i) The acidic strength decreases in the order$HCl>{H}_{2}S>P{H}_{3}$

(ii) Tendency to form pentahalides decreases down the group in group 15 of the periodic table.

(b) Complete the following chemical equations :

(i) ${P}_{4}+S{O}_{2}C{l}_{2}\to$

(ii) $Xe{F}_{2}+{H}_{2}O\to$

(iii) ${I}_{2}+\underset{\left(conc\right)}{HN{O}_{3}\to }$

Concept Videos :-

#7 | 17th Group

Concept Questions :-

group 17 ,preparation and properties