Chemical Reactions Quiz

Which of the following is an evidence of a chemical reaction?

• Change in shape

• Change in color

• Change in texture

• Change in size

What is the process in which one set of new substances called reactants is converted to a new set of substances called products?

• Physical reaction

• Chemical reaction

• Biological reaction

• Nuclear reaction

In a chemical equation, what does (aq) represent?

• Solid

• Liquid

• Aqueous

• Gas

What type of reaction is represented by the formula A + B → AB?

• Double displacement reaction

• Single displacement reaction

• Decomposition reaction

• Combination reaction

In the reaction C4H10 + O2 → CO2 + H2O, what type of reaction is it?

• Decomposition reaction

• Single displacement reaction

• Combination reaction

• Combustion reaction

What is the balanced chemical equation for the reaction: Li + F2 → LiF?

• Li + F2 → Li2F

• 2Li + F2 → 2LiF

• Li + F2 → LiF2

• Li + 2F2 → 2LiF

Which of the following is a hint for balancing chemical equations?

• Change the subscripts

• Change the coefficients only

• Change the chemical formulas

• Start with the simplest

What is the general formula for a decomposition reaction?

• AB + CD → AD + CB

• A + B → AB

• AB → A + B

• A + BC → AC + B

What is the product of the reaction: NaOH + KNO3 → NaNO3 + KOH?

• NaNO3 + KOH

• NaOH + KOH

• NaNO3 + NaOH

• KNO3 + KOH

What is the balanced chemical equation for the reaction: P4 + O2 → P4O10?

• 2P4 + 5O2 → 2P4O10

• P4 + 10O2 → P4O10

• 2P4 + 10O2 → 2P4O10

• P4 + 5O2 → P4O10