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