MCQ
aq. $NaOH + P_4$ (white) $\rightarrow PH_3 + X;$ compound $X$ is
- ✓$NaH_2PO_2$
- B$NaHPO_4$
- C$Na_2CO_3$
- D$NaHCO_3$
$P _4+3 NaOH +3 H _2 O \rightarrow PH _3+3 NaH _2 PO _2$
White phosphorus react with sodium hydroxide and water to produce phosphine and sodium hypophosphite. Sodium hydroxide - cold, concentrated solution. This reaction takes place slow.
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| List $-I$ (Atomic Number) | List $-II$ (Block of periodic table) |
| $A$ $37$ | $I$ $p-$block |
| $B$ $78$ | $II$ $d-$block |
| $C$ $52$ | $III$ $f-$block |
| $D$ $65$ | $IV$ $s-$block |
નીચે આપેલા વિકલ્પોમાંથી યોગ્ય ઉત્તરની પસંદગી કરો.
( Given that : ${\left( {\Delta {H^o}_f} \right)_{{H_2}O(g)}} = - 56.0\,\,kcal/mol$ and it is independnet of temperature).......$ K$