Question

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.

Answer 1

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

Answer 2

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`