chemical reactions

What reaction has the following general formula:

AB --> A + B

• Combination

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

What reaction has the following general formula:

A + CD --> C + AD

• Combination

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

What reaction has the following general formula:

AB + CD --> CB + AD

• Combination

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

What reaction has the following general formula:

A + B --> AB

• Synthesis/Combination

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

What reaction has the following general formula:
 $C_xH_y\ +\ O_2\ ->CO_{2\ }+\ H_2O$  

• synthesis/Combination

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

What is the general reaction scheme for a single replacement reaction?

• A + B --> AB

• AB --> A + B

• A + CD --> C + AD

• AB + CD --> CB + AD

• $C_xH_y+O_2\ ->\ CO_2+H_2O$

What is the general reaction scheme for a combination reaction?

• A + B --> AB

• AB --> A + B

• A + CD --> C + AD

• AB + CD --> CB + AD

• $C_xH_y+O_2\ ->\ CO_2+H_2O$

What is the general reaction scheme for a double replacement reaction?

• A + B --> AB

• AB --> A + B

• A + CD --> C + AD

• AB + CD --> CB + AD

• $C_xH_y+O_2\ ->\ CO_2+H_2O$

What is the general reaction scheme for a decomposition reaction?

• 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:
 $2H_2+O_2->2H_2O$  

• synthesis/Combination

• Decomposition

• Single Replacement

• Double Replacement

• Combustion