Question

1. drag and drop the types of reactions with the descriptions

when a substance reacts with oxygen to create energy in the form of heat or light
when one substance breaks down into two or more substances
when the cations of one compound replace the cations of another compound to form two entirely new compounds
when two or more substances combine to form a new compound
when one element is replaced by another element in a compound
choices
combustion reaction
synthesis reaction
single replacement reaction
decomposition reaction
double replacement reaction

Explanation:

1. For the description "when a substance reacts with oxygen to create energy in the form of heat or light", the reaction type is combustion reaction as combustion involves reacting with oxygen to release energy.
2. For "when one substance breaks down into two or more substances", this is decomposition reaction as decomposition is the breakdown of a single substance.
3. For "when the cations of one compound replace the cations of another compound to form two entirely new compounds", this is double replacement reaction (in double replacement, ions (including cations) swap between compounds).
4. For "when two or more substances combine to form a new compound", this is synthesis reaction as synthesis is combining substances to form a new one.
5. For "when one element is replaced by another element in a compound", this is single replacement reaction as single replacement involves one element replacing another in a compound.

Answer:

1. when a substance reacts with oxygen to create energy in the form of heat or light: combustion reaction
2. when one substance breaks down into two or more substances: decomposition reaction
3. when the cations of one compound replace the cations of another compound to form two entirely new compounds: double replacement reaction
4. when two or more substances combine to form a new compound: synthesis reaction
5. when one element is replaced by another element in a compound: single replacement reaction