pBlock ElementsII 1 Question 105
102. Write balanced equations for the following.
(1987, 2M)
(i) Phosphorus is reacted with boiling aqueous solution of sodium hydroxide in an inert atmosphere.
(ii) Dilute nitric acid is slowly reacted with metallic tin.
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Solution:
- (i) $\mathrm{P}{4}+3 \mathrm{NaOH}+3 \mathrm{H}{2} \mathrm{O} \xrightarrow{\text { Inert atm. }} 3 \mathrm{NaH}{2} \mathrm{PO}{2}+\mathrm{PH}_{3}$ (phosphine)
(ii) $4 \mathrm{Sn}+10 \mathrm{HNO}{3} \longrightarrow 4 \mathrm{Sn}\left(\mathrm{NO}{3}\right){2}+\mathrm{NH}{4} \mathrm{NO}{3}+3 \mathrm{H}{2} \mathrm{O}$ dil
