pBlock ElementsII - Result 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) $2 Ca _3\left(PO _4\right) _2+6 SiO _2+10 C \stackrel{\Delta}{\longrightarrow} 6 CaSiO _3 +10 CO+\underset{\text{(White)}}{P _4}$

(ii) $\left(NH _4\right) _2 SO _4+NO+NO _2 \longrightarrow 2 N _2+3 H _2 O+H _2 SO _4$