What happens when 

(i) magnesium is burnt in air 

(ii) quick lime is heated with silica 

(iii) chlorine reacts with slaked lime 

(iv) calcium nitrate is heated ?

Asked by Pragya Singh | 1 year ago |  41

1 Answer

Solution :-

(i) When Magnesium is burnt in air, it does so with a dazzling bright light resulting in the formation of Mg3N2 and MgO.

2Mg + O2 \( \overset{Burning}{\rightarrow}\) 2MgO

3Mg + N\( \overset{Burning}{\rightarrow}\) Mg3N2

 

(ii) Silica (SiO2) combines with Quick lime (CaO) resulting in formation of Slag.

           CaO + SiO2 \( \overset{Heat}{\rightarrow}\)→CaSiO3

 

(iii) Bleaching powder is formed when chlorine is made to react with slaked lime.

Ca(OH)2 + Cl2 \( \overset{Heat}{\rightarrow}\) CaOCl2 + H2O

 

(iv) Calcium nitrate, when heated, undergoes decomposition to form calcium oxide.

2Ca(NO3)2(s) \( \overset{Heat}{\rightarrow}\) 2CaO(s) + 4NO2(g) + O2(g)

Answered by Abhisek | 1 year ago

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