Question

science test .
How can we say that a chemical deaction
has taken place ?​

Answer 1

We can say that a Chemical Reaction has taken place by the below observation.

# Evolution of [G]as.

# Change in [S]tate.

# Change in [T]emperature.

# Light emissi[on]

# Formation of [P]recipitate.

# Change in [C]olour.

Extra answer to remember the observation, which are used to determine the Chemical Reaction has taken place is, remember [G],[S],[T], [on] [P],[C].

Answer 2

By using the formula or by seeing its experience or experiment