(i) When magnesium is burnt in air, it forms magnesium oxide (MgO). The reaction taking place is given below:2Mg (s) + O2 2MgO(ii) When quick lime (CaO) is heated with silica (SiO2), it forms calcium silicate (CaSiO3). The reaction taking place is given below:(iii) When chlorine reacts with slaked lime (Ca(OH)2), it forms calcium hypochlorite (Ca(OCl)2) and calcium chloride (CaCl2). Both products are constituents of bleaching powder. The reaction taking place is given below:(iv) When calcium nitrate (Ca(NO3)2) is heated, it forms quick lime (CaO), nitrogen dioxide (NO2) and oxygen. The reaction taking place is given below:

Q. 174.2( 20 Votes )

What happens when

Class 11th NCERT - Chemistry Part-II 10. The s - Block Elements

Answer :

(i) When magnesium is burnt in air, it forms magnesium oxide (MgO). The reaction taking place is given below:

2Mg (s) + O₂ 2MgO

(ii) When quick lime (CaO) is heated with silica (SiO₂), it forms calcium silicate (CaSiO₃). The reaction taking place is given below:

(iii) When chlorine reacts with slaked lime (Ca(OH)₂), it forms calcium hypochlorite (Ca(OCl)₂) and calcium chloride (CaCl₂). Both products are constituents of bleaching powder. The reaction taking place is given below:

(iv) When calcium nitrate (Ca(NO₃)₂) is heated, it forms quick lime (CaO), nitrogen dioxide (NO₂) and oxygen. The reaction taking place is given below:

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