Identify the type of chemical reaction?

Question

1) HCL+AgNO3->HNO3 +AgCl

2)C7H16+11 O2->7 CO2 + 8 H2O

3) P4O10 +6 H2O->4H3PO4

4)3 Fe +4H2O->Fe3O4+ 4 H2

5)2 H3PO4->H4P2O7+H2O

6)Al2(SO4)3+ 3 Ca (OH)2-> 2 Al(OH)3 +3 CaSO4

7)CAC2+ 2 H2O->C2H2+ Ca(OH)2

8)Fe2O3+3C->3CO+ 2Fe

9)2MgNH4PO4->Mg2P2O7+2 NH3+ H2O

Answer 1

1) double replacement
2) combustion
3) synthesis
4) single replacement
5) decomposition
6) double replacement
7) double replacement
8) single replacement
9) decomposition