(a) Fluorine is a stronger oxidizing agent than chlorine. Why ?
(b) Write one use of chlorine gas
(c) Complete the following equation
`CaF_(2)+H_(2)SO_(4)rarr`

Explanation

(a) It is due to (i) low enthalpy of dissociation of F-F bond (ii) high hydration enthalpy of ` F^(–)` .
(b) (i) for bleaching wood pulp (required for manufacture of paper and rayon), cotton and textiles.
(ii) In the metallurgy (extraction) of gold and platinum.
(iii) In the manufacture of dyes, drugs and organic compounds such as ` CHCl_(3), C Cl_(4)`, DDT, refrigerants (`C Cl_(2)F_(2)`, freon), and bleaching powder.
(iv) In the preparation of poisonous gases such as phosgene ` (COCl_(2))` , tear gas `(C Cl_(3)NO_(2))` , mustard gas `(ClCH_(2)CH_(2)SCH_(2)CH_(2)Cl)` , etc. Mustard gas was used by Germany in World War I.
(v) In sterilizing drinking water.
`(c) CaF_(2)+H_(2)SO_(4) rarr CaSO_(4)+2HF`