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Q 2661867725.     (a) Explain the following:
(i) `NF_3` is an exothermic compound whereas `NCl_3` is not.
(ii) `F_2` is most reactive of all the four common halogens.
(b) Compete the following chemical equations:
(i) `C + H_2 SO_4 conc. (->)`
(ii) `P_4 + NaOH + H_2O ->`
(iii) `Cl_2 + F_2 underset (exces) (->)`
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)