Chemical Reaction Types - Help!?

Question

I'm in desperate need of some help here. I need to correctly identify the type of reaction for the following balanced chemical equations.

The different "types" that I may chose from include: combination, decomposition, single replacement, double replacement, or combustion.

1) 3 CaCl2 + 2 Na3PO4 ---> Ca3(PO4)2 + 6 NaCl

2) BaCl2 + Na2SO4 ---> BaSO4 + 2 NaCl

3) FeCl3 + 3 KSCN ---> Fe(SCN)3 + 3 KCl

4) Na2CO3 + 2 HCl ---> CO2 + H20 + 2 NaCl

Any help would be appreciated!!

Answer 1

1) Double replacement, general form is AB + CD --> AD + CB

2) Double replacement

3) Double replacement

4) Combustion, because H2O and CO2 are products