The correctorder ofelectron gain enthalpywithnegativesign of F, C1 , Br andI , havingatomicnumber 9, 17, 35 and 53 respectivelyis

The correctorder ofelectron gain enthalpywithnegativesign of F, C1 , B

1.	The correctorder ofelectron gain enthalpywithnegativesign of F, C1 , Br andI , havingatomicnumber 9, 17, 35 and 53 respectivelyis
Answer» `I GT BR gt C1 gt F` `F gt C1 gt Br gt I` `C1 gt F gt Br gt I` `Br gt C1 gt I gt F` Solution :Due tosmallersize `Delta_(EG) H_(1)` F is lowerthan thatof C1 . Thuscorrectorder ofelectrongain enthalpy(in kJ `mol^(-1))`with negativesigh followsthe ORDER: `C1 (-349 ) gt F (-328) gt Br (-325) gt (- 295)` i.e.,option ( c ) ISCORRECT.