pBlock ElementsII 1 Question 107
104. Write down the balanced equation for the reactions when
(i) calcium phosphate is heated with a mixture of sand and carbon.
(ii) ammonium sulphate is heated with a mixture of nitric oxide and nitrogen dioxide.
(1985, 2M)
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Solution:
- (i) $2 \mathrm{Ca}{3}\left(\mathrm{PO}{4}\right){2}+6 \mathrm{SiO}{2}+10 \mathrm{C} \stackrel{\Delta}{\longrightarrow} 6 \mathrm{CaSiO}_{3}$
$$ +10 \mathrm{CO}+\mathrm{P}_{4} $$
(white)
(ii) $\left(\mathrm{NH}{4}\right){2} \mathrm{SO}{4}+\mathrm{NO}+\mathrm{NO}{2} \longrightarrow 2 \mathrm{~N}{2}+3 \mathrm{H}{2} \mathrm{O}+\mathrm{H}{2} \mathrm{SO}{4}$
