(i) NH3 + 3Cl2 (excess ) NCl3+ 3HCl
Chlorine replaces hydrogen completely to form nitrogen trichloride which is an explosive and the remaining chlorine forms HCl.
(ii) XeF6 + 2H2O XeO2F2 + 4HF
Partial hydrolysis of XeF6 gives oxyfluorides.
(i) (NH4)2Cr2O7 N2 + 4H2O + Cr2O3
(ii) 4H3PO3 PH3 + 3H3PO4
On heating, it undergoes disproportionation to form PH3 and H3PO4 with +3 and +5 oxidation states respectively.
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