Question

Fill in the blanks :
(i) $Ca_3P_2 + 6HCl \to 3CaCl_2 + .....p....$
(ii) $P_4 + 3NaOH + 3H_2O \to\, ....q.....+ 3NaH_2PO_2$
(iii) $PH_4I + KOH \to KI +H_2O +....r..... \,.$
$p$, $q$ and $r$ respectively are

• A. $PH_3$, $H_3PO_3$, $PI_3$
• B. $PH_3$, $PH_3$, $PH_3$
• C. $PCl_3$, $H_3PO_4$, $PH_3$
• D. $PCl_5$, $PH_3$, $P_4O_6$

Answer 1

Answer: (B)

$p, q$ and $r$ respectively are $PH _{3}, PH _{3}, PH _{3}$
(i) $Ca _{3} P _{2}+6 HCl \rightarrow 3 CaCl _{2}+ PH _{3}$
(ii) $P _{4}+3 NaOH +3 H _{2} O \rightarrow PH _{3}+3 NaH _{2} PO _{2}$
(iii) $PH _{4} I + KOH \rightarrow KI + H _{2} O + PH _{3}$