Write complete balanced reactions for the following :
(a) Red phosphorous reacts with iodine in presence of water.
(b) White phosphrous is boiled with a strong solution of `NaOH` in an inert atmosphere.

Explanation

(a) `P_4(Red) + 6 I_2 rarr 4 P I_3`
`2 PI_3 + 3H_2 O rarr H_3 PO_3 + 3 HI`
(b) `underset("White")(P_4) + 3NaOH + H_2 O rarr underset("Soldium hypophosphite")(3 NaH_2PO_2) + underset ("Phosphine")(4PH_3)`
( c) `P_4 + 20 HNO_3 rarr 4 H_3PO_4 + 20 NO_2 + 4 H_2 O`
(d) `I_2 + 10 HNO_3(conc). rarr 2 HIO_3 + 10 NO_2 + 4 H_2 O`
( e) `H_3PO_4 + 21 HNO_3 + 12 (NH_4)_2 MoO_4 rarr (NH_4)_3 PO_4. 12 MoO_3 + 21 NH_4 NO_3 + 12 H_2 O`
(f) `Na_2 HPO_4 + MgSO_4 + NH_4OH rarr MaNH_4 PO_4 + Na_2 SO_4 + H_2 O`