MCQ
Which acid on heating produces phosphine ?
- Aphosphoric acid
- ✓phosphorous acid
- CPeroxymonophosphoric acid
- Dmetaphosphoric acid
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where $gly =$ glycine, $en =$ ethylenediamine and $bpy =$ bipyridyl moities. (At. nos. $Ti = 22, V = 23,$$ Fe = 26, Co = 27$)
$X\xrightarrow[\Delta ]{{{H}_{2}}O}A+B+C+D$
What is $A$

| Reaction | Product | |
| $I$ | $RX + AgCN$ | $RNC$ |
| $II$ | $RX + KCN$ | $RCN$ |
| $III$ | $RX + KNO_2$ | (image) |
| $IV$ | $RX + AgNO_2$ | $R-O-N = O$ |

Reason : The concentration of salt content in the cells increases.