| On reaction with Cig, phosphorus forms two types of halides A and B. Halide A is yellowish white powder, but halide B is colourless oily liquid. Which of the following is/are their hydrolysis products? | |
| (I) \[{{H}_{3}}P{{O}_{2}}\] | (II) \[{{H}_{3}}P{{O}_{3}}\] |
| (III) \[{{H}_{3}}P{{O}_{4}}\] | (IV) \[{{H}_{3}}P{{O}_{4}}\] |
A) I and II
B) II and III
C) III and IV
D) I and IV
Correct Answer: B
Solution :
[b]| On reaction with \[C{{l}_{2}},\] phosphorus forms two halides \[PC{{l}_{5}}(A)\]which is yellowish powder and \[PC{{l}_{3}}(B)\]is colourless oil liquid. |
| ?A? is \[PC{{l}_{5}}\] and \['B'\]is \[PC{{l}_{3}}.\] |
| \[{{P}_{4}}+10C{{l}_{2}}\xrightarrow{{}}4PC{{l}_{5}}.\] |
| \[{{P}_{4}}+6C{{l}_{2}}\xrightarrow{{}}4PC{{l}_{3}}\] |
| When 'A' and 'B' are hydrolysed. |
| [a] \[\underset{\begin{smallmatrix} [A] \\ \text{Phosphorus} \\ \text{pentachloride} \end{smallmatrix}}{\mathop{PC{{l}_{5}}}}\,+4{{H}_{2}}O\xrightarrow{{}}\underset{\begin{smallmatrix} \text{Phosphoric} \\ \text{acid} \end{smallmatrix}}{\mathop{{{H}_{3}}P{{O}_{4}}}}\,+5HCl\] |
| [b] \[\underset{\begin{smallmatrix} [B] \\ \text{Phosphous} \\ \text{trichloride} \end{smallmatrix}}{\mathop{PC{{l}_{5}}}}\,+3{{H}_{2}}O\xrightarrow{{}}\underset{\begin{smallmatrix} \text{Phosphoride} \\ \text{acid} \end{smallmatrix}}{\mathop{{{H}_{3}}P{{O}_{4}}}}\,+3HCl\] |
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