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