Question

question 4
choose the chemical change from the following options
flattening a piece of dough
adding ice cubes to a drink
generation of heat from the decomposition of methane
making shapes with paper

Explanation:

A chemical change results in the formation of new substances. Flattening dough, adding ice - cubes to a drink, and making shapes with paper are physical changes as they only change the physical form and not the chemical composition. The generation of heat from the decomposition of methane is a chemical change because methane decomposes into other substances during the process.

Answer:

Generation of heat from the decomposition of methane