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