A) None of these B) Chemical change C) Physical change
A) Physical change B) Chemical change C) None of these
A) Chemical change B) Physical change C) None of these
A) None of these B) False C) True
A) None of these B) Chemical change C) Physical change
A) Chemical change B) None of these C) Physical change
A) Chemical change B) Both physical and chemical changes C) Physical change
A) Physical change B) Chemical change C) both physical and chemical change
A) False B) True
A) This was a chemical change because a solid formed in the solution. B) This is NOT a chemical reaction because we just mixed together two liquids. Dissolving is a physical change.
A) Gas was produced in the chemical reaction. B) A color change took place. C) One of the new chemicals that formed was a solid. D) A physical change took place
A) burning wood B) when food rots C) melting ice D) rusting iron
A) burning coal B) chopping onions C) dynamite exploding D) digesting food
A) combustion B) physical C) chemical
A) zinc and hydrochloric acid B) zinc chloride and hydrogen C) zinc and hydrogen D) hydrochloric acid and hydrogen
A) sugar, carbon and water B) heat C) carbon and water D) sugar
A) sugar, carbon and water B) sugar C) heat D) carbon and water
A) manganese dioxide & hydrogen peroxide B) hydrogen peroxide and oxygen C) manganese dioxide and oxygen D) oxygen
A) sodium carbonate + water --> sodium hydroxide + carbon dioxide B) sodium hydroxide + carbon dioxide + sodium carbonate --> water C) sodium hydroxide + carbon dioxide --> sodium carbonate + water D) none of the answers are correct
A) barium nitrate + sulfuric acid --> barium sulfate + nitric acid B) none of the answers are correct C) barium nitrate <-- sulfuric acid + barium sulfate + nitric acid D) barium sulfate + nitric acid --> barium nitrate + sulfuric acid
A) change in temperature B) none of these are correct C) oxygen gas is produced D) a change of state
A) increase in temperature B) gas formation C) precipitate formation D) none of these are correct.
A) the products were liquid water and solid sodium chloride B) a precipitate was the reactant C) none of the answers are correct. D) hydrogen could possibly be a product in this reaction
A) oxygen B) hydrogen or oxygen C) hydrogen D) carbon dioxide
A) oxygen or hydrogen B) carbon dioxide C) hydrogen D) oxygen
A) hydrogen B) carbon dioxide C) oxygen D) marble chips E) hydrochloric acid |