A) Physical change B) Chemical change C) None of these
A) None of these B) Physical change C) Chemical change
A) Physical change B) Chemical change C) None of these
A) None of these B) False C) True
A) Chemical change B) Physical change C) None of these
A) None of these B) Chemical change C) Physical change
A) Physical change B) Both physical and chemical changes C) Chemical change
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) One of the new chemicals that formed was a solid. B) Gas was produced in the chemical reaction. C) A physical change took place D) A color change took place.
A) burning wood B) when food rots C) melting ice D) rusting iron
A) chopping onions B) digesting food C) dynamite exploding D) burning coal
A) chemical B) physical C) combustion
A) zinc chloride and hydrogen B) hydrochloric acid and hydrogen C) zinc and hydrogen D) zinc and hydrochloric acid
A) heat B) sugar, carbon and water C) carbon and water D) sugar
A) sugar B) carbon and water C) heat D) sugar, carbon and water
A) manganese dioxide & hydrogen peroxide B) hydrogen peroxide and oxygen C) manganese dioxide and oxygen D) oxygen
A) sodium hydroxide + carbon dioxide + sodium carbonate --> water B) sodium hydroxide + carbon dioxide --> sodium carbonate + water C) none of the answers are correct D) sodium carbonate + water --> sodium hydroxide + carbon dioxide
A) none of the answers are correct B) barium nitrate + sulfuric acid --> barium sulfate + nitric acid C) barium nitrate <-- sulfuric acid + barium sulfate + nitric acid D) barium sulfate + nitric acid --> barium nitrate + sulfuric acid
A) a change of state B) change in temperature C) oxygen gas is produced D) none of these are correct
A) gas formation B) increase in temperature C) precipitate formation D) none of these are correct.
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) hydrogen or oxygen B) carbon dioxide C) hydrogen D) oxygen
A) oxygen or hydrogen B) hydrogen C) carbon dioxide D) oxygen
A) oxygen B) hydrogen C) hydrochloric acid D) marble chips E) carbon dioxide |