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Which of the following choices is the most conclusive in determining whether a chemical reaction has taken place?

a change in color

a change in odor

a gas was formed

a change in the identity of the substance(s)


If different products are not created during a process, then a chemical reaction has not occurred. True or false?


Chemical equations provide:

the physical state of each reactant and product.

the ratios of reactants and products.

the chemical identity of the reactants and products.

all of the above information

Verified Answer :

taskmasters

For the first question, i think the correct answer is the third option. When a gas is formed, it is the most conclusive in determining whether a chemical reaction has taken place given that none of your reactants is a gas.

For the second question, the statement is true.

For the third question, the correct answer is the last option.

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