1.

Among the following, the number of compounds that can react with PCl_(5) to give POCl_(3) is : O_(2), CO_(2), SO_(2), H_(2)O, H_(2)SO_(4), P_(4)O_(10).

Answer»

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Solution :these are :
(i) `2 PCl_(5) + O_(2) OVERSET(Delta)rarr 2POCl_(3) + 2Cl_(2)" ,"`
(ii) `[PCl_(5) rarr PCl_(3) + Cl_(2)" ,"" "2PCl_(3) + O_(2) rarr 2 POCl_(3)]`
(iii) `PCl_(5) + SO_(2) rarr POCl_(3) + SOCl_(2)`
(iv) `PCl_(5) + H_(2)O rarr POCl_(3) + 2HCl" ,"`
`POCl_(3)` further reacts with `H_(2)O` to GIVE `H_(3)PO_(4)`
`POCl_(3) + 3 H_(2)O rarr H_(3)PO_(4) + 3 HCl`
(v) `2PCl_(5) + H_(2)SO_(4) rarr 2 POCl_(3) + SO_(2)Cl_(2)+2HCl`
(VI) `6PCl_(5) + P_(4)O_(10) rarr 10 POCl_(3)`


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