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