sblock Elements 2 Question 16
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17. $\mathrm{MgSO}{4}$ on reaction with $\mathrm{NH}{4} \mathrm{OH}$ and $\mathrm{Na}{2} \mathrm{HPO}{4}$ forms a white crystalline precipitate. What is its formula? $(2006,3 \mathrm{M})$
======= ####17. $\mathrm{MgSO}{4}$ on reaction with $\mathrm{NH}{4} \mathrm{OH}$ and $\mathrm{Na}{2} \mathrm{HPO}{4}$ forms a white crystalline precipitate. What is its formula? $(2006,3 \mathrm{M})$
3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed (a) $\mathrm{Mg}\left(\mathrm{NH}{4}\right) \mathrm{PO}{4}$
(c) $\mathrm{MgCl}{2} \cdot \mathrm{MgSO}{4}$
(b) $\mathrm{Mg}{3}\left(\mathrm{PO}{4}\right)_{3}$
(d) $\mathrm{MgSO}_{4}$
(1993, 1M)
(a) $\mathrm{Cs}$
(b) $\mathrm{Si}$
(c) $\mathrm{Sn}$
(d) $\mathrm{Ti}$
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Answer:
Correct Answer: 17. (a)
Solution:
- Magnesium ammonium phosphate is precipitated out. $\mathrm{MgSO}{4}+\mathrm{NH}{4} \mathrm{OH}+\mathrm{Na}{2} \mathrm{HPO}{4} \longrightarrow \mathrm{Mg}\left(\mathrm{NH}{4}\right) \mathrm{PO}{4} \downarrow+\mathrm{Na}{2} \mathrm{SO}{4}$
