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