A) They do not react with metals. B) They taste bitter. C) They turn red litmus paper blue. D) They turn blue litmus paper red.
A) acid and a base. B) base and a salt. C) acid and a metal. D) salt and water.
A) only for reactions that take place in closed systems. B) for no reactions at all. C) for reactions in both open and closed systems. D) only for reactions that take place in open systems.
A) the pH level of the solution would be more than 12 B) the pH level of the solution would be between 3 and 11 C) the substances would not mix, and you could still take two different pH readings D) the pH level of the folution would be less than 3
A) The apple and lemon have the same pH level. B) The apple has a lower pH than the lemon. C) The lemon has a lower pH than the apple. D) The lemon has a higher pH than the apple.
A) Matter is not created or destroyed. B) Matter is not changed. C) The total mass of the reactants is less than the total mass of the products. D) The total mass of the reactants if greater than the total mass of the products.
A) Endothermic reaction-physical change B) Phase Change-physical change C) Exothermic reaction-physical change D) Phase Change-chemical change
A) exothermic reaction-physical change B) Exothermic reaction-chemical change C) endothermic reaction-chemical change D) endothermic reaction-physical change
A) rusts B) has a long narrow shape with a smooth texture C) reacts with hydrochloric acid to release hydrogen gas D) does not burn when a flame is applied
A) a tree burning after a lightning strike B) steam rising from pavement C) a tree branch breaking D) water freezing in a pond
A) color change B) chemical change C) physical change D) electromagnetic change
A) unrelated to the total mass of the products. B) less than the total mass of the products. C) exactly equal to the total mass of the products. D) greater than the total mass of the products.
A) precipitate. B) a change in color. C) shape change. D) mass change.
A) has a pH above 7 and tastes bitter. B) has pH lower than 7 and taste sour. C) has a pH above 7 and tastes sour. D) turns red litmus paper blue.
A) It is most effective in a highly basic environment. B) It is most effective in a slightly basic environment. C) Is it most effective in a slightly acidic environment. D) It is most effective in a highly acidic environment.
A) melting point B) conductivity C) the ability to reflect light D) reactivity
A) rusting B) melting C) burning D) corroding
A) coal burning B) frying an egg C) water turning into steam D) ice melting
A) breaking a toothpick in half B) melting ice C) boiling water D) toasting a marshmallow
A) a mixture B) an electron C) an atom D) a compound
A) The chemical reaction created matter. B) Not all of the products and reactants could be measured because the chemical reaction took place in an open system. C) The chemical reaction did not work as expected because it took place in a closed system. D) The chemical reaction destroyed matter.
A) energy is being absorbed by the reaction. B) no reaction is taking place. C) matter is being released. D) an exothermic reaction is occuring.
A) C B) A C) D D) B
A) an atom B) an electron C) a compound D) a mixture
A) Sodium loses one electron and chlorine gains one electron. B) Sodium gains one electron and chlorine loses on electron. C) Sodium gains seven electrons and chlorine loses seven electrons. D) Sodium loses seven electrons and chlorine gains seven electrons.
A) It is a new element because a chemical change took place. B) It is a solution because the ingredients cannot be separated. C) It is a mixture because each ingredient kept its original properties. D) It is a new chemical compound because a physical change took place.
A) Citrus Fruit (pH 2-3) B) Baking Soda (pH 8-9) C) Dairy (pH 5-7) D) Water (pH 6-7)
A) a reactant. B) a product. C) a solvent. D) a solute.
A) very basic. B) very acidic. C) negatively charged. D) positively charged.
A) green beans B) cheddar cheese C) apples D) ham
A) a solvent. B) a suspension. C) a solute. D) a mixture.
A) indicator B) base C) litmus paper D) acid
A) False B) True
A) Physical change because a precipitate formed.. B) Chemical change because a precipitate formed. C) Chemical change because the mass stayed the same. D) Physical change because a new substance formed.
A) False B) True |