Types of chemical reactions

compound ---> element + element

What reaction has the following general formula: A + CD --> C + AD?

What reaction has the following general formula: A + B --> AB?

What reaction has the following general formula: AB + CD --> CB + AD?

What reaction has the following general formula: $$C_xH_y + O_2 -> CO_2 + H_2O$$ ?

What is the general reaction scheme for a decomposition reaction? Options: A + B --> AB, AB --> A + B, A + CD --> C + AD, AB + CD --> CB + AD, $$C_xH_y+O_2\ ->\ CO_2+H_2O$$

What type of reaction is the following: $$BaCl_2+2KI\ ->\ 2KCl\ +\ BaI_2$$ ?

What type of reaction is the following: $$C_{11}H_{24}+17O_2->\ 11CO_2\ +\ 12H_2O$$ ?

What type of reaction is the following: $$2KI\ ->\ 2K\ +\ I_2$$ ? Options: Combination, Decomposition, Single Replacement, Double Replacement, Combustion.

What type of reaction is the following: $$2NaHCO_3->\ Na_2CO_3+CO_2+H_2O$$ ?