Identify the type of chemical reaction that is described.


neutralization

combustion

synthesis

decomposition


Pairs-

Water breaks down into

hydrogen and oxygen.


Leaves make starch using

chlorophyll and carbon dioxide.


Food burns in oxygen gas

and releases a lot of energy.


Adding vinegar (acid) to

baking soda (alkali) gives

a product that is neither

acidic nor alkaline.

Verified Answer :

Water breaks down into  hydrogen and oxygen: It is a decomposition reaction as a single substance decomposes to give two products.

\(H_2O \rightarrow H_2 +\frac {1}{2}O_2\)

Leaves make starch using  chlorophyll and carbon dioxide: Synthesis reaction: as the synthesis reaction involves two or more than two reactants which join together to result into a single main product along with the formation of simple by products.

\(6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2\)

Food burns in oxygen gas  and releases a lot of energy: Combustion: Combustion process involves the use of oxygen to give products along with release of energy.

\(C_6H_{12}O_6 + 6O_2\rightarrow 6CO_2 + 6H_2O\)

Adding vinegar (acid) to baking soda (alkali) gives  a product that is neither  acidic nor alkaline: Neutralization: acetic acid in vinegar reacts with soda (base) to give salt (neutral) and .

\(CH_3COOH + NaHCO_3\rightarrow CH_3COONa +H_2O + CO_2\)





Answer:

water breaks down - decomposition

leaves make starch - synthesis

food burns in oxygen gas - combustion

adding vinegar - neutralization

I took the test, and this was right