(a) Give reasons for the following :

(i) Bond enthalpy of F2 is lower than that of Cl2.    

(ii) PH3 has lower boiling point than NH3.

(b) Draw the structures of the following molecules :

(i) CIF3                                 (ii) HPO33                            (iii) XeF4

Concept Videos :-

#7 | 17th Group

Concept Questions :-

group 17 ,preparation and properties
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